Nice job on the LD! The hardest part is definitely over, I would say. You’ve had your first LD and many more will be sure to follow.
If MILD works for you, keep doing it! It wouldn’t hurt to try WILD or WBTB every now and then, either.
Maintaining lucidity can be tough, but this is a really good thread to read if you’re having trouble.
I’ve found that influence over dreams has a variety of factors, the most important being how lucid you are. Try to yell things like “Increase lucidity!” and really focus on all the details of the dream. If you want to fly or something, you have to really believe you can. Just keep telling yourself you’re in a dream and anything is possible!
Good luck on your LDing and welcome!