Step one: Identify the problem that you want to fix.
Step two: Figure out how to help fix it.
Step three: Figure out a time frame and finite goals.
Step four: Figure out the supplies you will need.
Step five: Figure out your budget, and if supplies cost is greater than budget either reevaluate the scope of the project, or figure out a way to get supplies cheaper or how to increase the money avalable for the budget.
Step Six: Impliment it.