Flying seems to be different for everyone. Some people can just jump off and fly their first time. For me, it took years to fly decently. I ended up using a technique kind of like Ironman, where I push an invisible force through the soles of my feet and sometimes my palms for stability. I need to jump off the ground first to do this, but it works pretty well. If you're scared, you can just try jumping off the second story your first time.