I want to make a great band.

Since childhood I wanted to have a band but by study because of my studies and my parents it wasn't possible. Now I keep wanting this (this is correct, but it sounds a little weird. Maybe can use "I still want to make a band, but...", but in my province this is not favorable because the people of here do not listen to rock music, so I need to travel to Buenos Aires because that is where my band will progress.

PD : Alternative title " I wanna make a great band". It's correctly? Is this correct?

If you are writing formally like in an essay, you would use "want to" instead of "wanna," but otherwise it is fine.