Same here, I never learned how to tie my shoes, and I'm 27 years old, my mom explained to me many times, even an older cousin of mine when I was a kid, but I never got it right.
When my shoes untie by itself, I simply put the ties inside the shoes, embarassing as fuck.
And looking back, I always had a hard time making simple things, when I was in Primary School, third grade, I used to ask friends to open my coke or to draw a line with a ruler, but one day the teacher showed me, and I didn't need to ask anyone anymore.
When it comes to bike: I had one when I was a kid, but it's been a long time since I last had one, so I would probably need to learn how to ride it again.