If you aren't, the nicest gift you can give yourself in 10 years is a blog, even if it's private and you write all the crazy stuff you're learning and doing and how scary it felt at first and how great it felt after.
Some things I had someone said to me and I hope you'll say to someone at 14 one day:
As you get older you'll meet so many subtle doubt worshippers that spread their doubts because they can't get over their own self-doubt.
Be a man of action and launching. Haters and doubters are busy doing nothing.
Don't ever let anyone poison this ability to build, and launch.
Don't ever let anyone tell you you can't figure out anything and build something.
Do laugh, while you launch and ship often while everyones busy optimizing their stack.