Well, you’ve already taken your first steps by joining up and posting on here - welcome mate 😃
Take the time to look around and get a feel for the place - the Welcome to the OT.com and ‘How do I do this?’ on the OriginalTrilogy.com threads may be of some interest - and contain links to other useful info too.
In relation to your Star Wars edit idea… there are a few similar / game-based projects which may be worth a look at for insight, inspiration and how-to’s etc - and can be found reading through the An Index Thread for Star Wars Fan Edits and Other Projects… thread (under the ‘Miscellaneous’ section).
Good luck with it 😃