Same as title

Do you have programming experience?

If yes, you can create a program that simulate the combat system.

If no, you can use pen and paper.

Then ask your friends if your new combat system is fun/better and ask for feedback.

They are definitely interested, its a bit old school combat style but more reality based, What should be my next step?

Thanks for replying

Next step? Well, what have you got? If you already have an idea about an interesting new combat system, then you need to think about how that system can be applied in a game, and actually make it real.

It seems that you start with gameplay. I assume that you've already planned the combat system and how the game will be played in general. Once you've determined the gameplay, think about the technology. Will the gameplay require a 3D world? Or will a 2D environment be sufficient? Think about the control, camera, and other stuff the players will interact with the world with. Then the story. You can't expect the players to sit in front of your game for 50 hours and have fun with it without a story. Fortunately, an RPG can tell a much more complex and in-depth story than other gameplay types like RTS or Arcade Shooter, so the advantage is yours.

Uh... sorry. There are many things, and my memory isn't so good. Gameplay, technology, story. Just think about those three first. That's a lot of stuff already. Think about how they can match with each other.

Once you finish the design, explain the game design to your friends. You can say, "I have an idea for a 2D Diablo-like RPG for PC, and there's this new combat system that will be very fun to play. The game takes place in a kingdom called... bla bla bla" The point is to make your friends understand what will the game be like. They need to know what they're going to make. The programmers then can decide what engine they need to use to accomplish the needs of the game design, the artists can start making stuff according to the engine (an isometric game will need different artworks from a side-scroller), and the writer can start thinking deeper about the story, like the quests, NPC, etc.

I only have a friend knows programming, so i should find enough people to support me to do it? or i should learn at least a bit in every area to start off it and maybe wait for someone to expand it for me later?

I am only a experience gamer, learnt a very little bit of coding(for cheating/rework/create within given system), my combat system idea will definitely work only in 3D, PC or console with controller like Wii(i know PS3 also has Move and XBox have an external kit do about the same with body instead of limited to controller too), freedom will be a big key of it, i would say its something like Mount and blade but even more complicated system (easy to learn, hard to master). It can be a single player game but sure i would like to make it multiplayer more (thats why i target it on PC since it seems easier for me on making it multiplayer). And it won't be small so i didn't really think of making it as a mobile game.

I think this should classify as an open world ARPG game, i have some sort of base world setting. I really suck at graphics(even failed in arts at school), i know its a must for me to have someone else work on this part instead. Quests should be made around the combat system instead of most modern games just made quests for extend game play/exp or money grinding, i know some type of economic system is needed but i don't have any concern about it now.

Thanks for reading and reply, What should be my main focus now?

Start by reading this. If you are not discouraged by it (and I am not saying that you should be), you'll need a few years of your time to learn how to make games.

Your first game won't be a successful open-world multi-player game, because you don't have experience to perform any of the roles required for such a project, so put that in the back burner. Start small, learn by doing.

Figure out what it is that you want your role to be in making games. It sounds like art is out of the question, so perhaps you should try to learn programming.

Good luck.

That will be my goal and now if i want to start with learning programming, which software i should choose, and how to start from small? should i try something similar or simplier idea to my goal, or i should learn more different type?

I am thinking of something like mount and blade but more battle focus instead of its ARPG+strategy style, as its a single player (maybe multiplayer at some point), does this fit in what you say about start from small? or this is still big that i should consider something even smaller?

No, what I mean by small is a Tetris clone. But even before you do that, you should learn how to program, which probably means not thinking about games for a few months, while you get a handle of your chosen language.

There are many threads about what language to learn first, and my current opinion is that it doesn't matter much: Python is a popular choice, but C#, Java or C would also be fine.

Thx for advice, i think i will try Java or Python for now