I have a project stopped a couple of months ago and I want to resume it.

I started for Mobiles, but after a little more research I realized that it was more complicated than I thought, and I don’t know if it can have the impact I would like it to have (which is not much either).

So I don’t know if I should concentrate more on PC development until I have a little more experience and then make the leap to mobile, or should it be the other way around? start with mobile and then to PC?

What would be the most profitable path in terms of learning and, if possible, generate a modest income?