Yeah, the main think is to come up with some idea and make it as small as possible. Yeah, and You will see that making game really really small with one mechanic but from start to end (menus, UI, sounds, even 1 level) take some time. If more You gonna make tiny projects then it will be easier for You to make bigger and bigger stuff :) First of all - don't worry. We've all been through that.
That is exactly one of the problems i have: i can't come up with that much of ideas, and the one i get, they have usually a scope too big for me... And usually, even i could surpass that problem, they are still many obstacles on my way... (like the lack of a planning phase)
I know this is supposed to happen, and that is normal, i know this will take a lot of time to master, and yet, for some reason, i can't stop worring and feel better about myself... :C
Thanks for your words!!