Just do what you are comfortable with, and don’t feel like you have to prove anything to anyone. If any of you from “real” mountainous terraine saw what passes for mountain bike trails at the 3 or 4 parks in the region that have them, you would probably laugh your rears off.
. If you put me on my bike atop some of your easiest trails in places like Utah or Washington State I’d probably wet my pants and beg for mercy.
It’s a skillset to be learned - like anything, time, practice, a good instructor or set of directions, being willing to analyze and learn from your mistakes will all contribute to increased confidence.
And if you decide it’s not for you, no shame in that either.