My advice here, is talk to your friends.
This thing is important for you. You just need to tell it to them. If they are true friends, then you can count on it they'll help you. Quite possibly you have similar interest, and whatever you like is not anathema to them. They'll get along. Indeed, you said they are somewhat interested in the game. That is a good start. First, you should probably give them the solo Campaign so they can get a feel of the game. Then, if they are still interested, you just start gaming. That is that simple. You gather your friends, you order pizzas and sodas, and have fun. Just like the guys did in E.T.
Your friends expect you to teach and DM the game for them. Well this is natural. This is your interest you want to share with them. Start sharing. I expect you to do this. You say you need more insight and expertise. You don't. You need a comforting and relaxing environment where you can have fun - you need your friends. Just tell them that this is gonna be so much fun, and it will be all the more fun if they take their parts in creating the game. Have them watch and read background and inspirational materials, have them know the rules, and have them help you with your tasks as a DM. If so, it will be fun. Probably, it will not be a very memorable game, but fun anyways. Looking back now, my first couple of DMing sessions were a disaster from almost all perspectives (plot, storytelling, rules-lawyering). Still we enjoyed it. Novice GM, novice players, no one was in the loop, still we wanted hard, and we very much enjoyed the thing.
Of course, you should also go to the Imperial Outpost and ask the gaming group if they'll have you. Practice is practice, and if you play a few sessions with experienced players, it will help you get a good grasp of the basics. And if they don't take you, they will still help you with good advice. In my experience, gaming outposts are truly friendly places. Role-players are a niche subculture, and are happy to welcome and aid newcomers. Still, playing with your friends is the most fun, so if possible try to game with them.