I think this thread's title is fairly close to the perfect last words starter, "I had an Idea..."

:)

The game is supposed to an open world game like skyrim My question is are there any easier engines that i can use to make this game

You could make it as a mod for Skyrim.

I really want to create an MMO, RTS, RPG game based on the anime Log Horizon.

Don't do it without permission of the IP owner.

I am fairly new to all this programming stuff

Then the IP owner won't give you permission to use their intellectual property.

Think @[member='Hodgman'], found a perfect solution for this idea:

You could make it as a mod for Skyrim.

@[member='ThatWalrusGuy'], I think you could like at this for some real scope and allow yourself to gain some experience.