Hi, I'm currently planning to develop 2D game with my brother as hobby.

Me: computer science major, but no game developing related experience. I can do C, C++, Python, web related techs(html, css, javascript, php, mysql, etc). Very brief knowledge about network. Algorithm & data structure knowledge. Familiar with mathematics, physics.

Brother: Good at drawing, but no game graphic related experience. Only he can do is just drawing on paper/tablet. Want to learn game graphic skills(animation, dot graphic, sfx, etc). Python beginner

To develop game with two-man system(programmer/graphics artist), what skills is additionally needed, respectively? We're looking for your advice. If there are useful article or contents, also thankful! ?