I wish you the best of luck with it! Everyone has a different pipeline and way to work, but something that has really helped me with the manga is to just jump into it and try to do the best I can with what I have. Self analyze, and make a conscious effort to improve. Not much different from how we are studying art, or any other skill really.
I'm eager to see what you put out when you are ready for it! It's always encouraging to see the works of others.