Mountain Bike Pants Is It Possible To Forget How To Ride A Bike? Or Was The Bike Too Big For Me?

Is it possible to forget how to ride a bike? Or was the bike too big for me? - mountain bike pants

I went mountain biking with my friend a few months.
A year since the last time you drove passed by bicycle.
Instead of one days of the painful disaster.
The first was the techno-trousers. He was caught in the gears. Ouch! I moved in shorts.
I tried to get into the bike.
I could barely get it going. I finally crashed and burned because I did not climb the mountain to a tree !!!!!!
Thinking that the tires too big for me.
I'm 5'4 "so I think we need to adjust the wheel of my size?
How do I get that right for me?

Thank you!