Allthough I'm quite well educated, I'm glad I didn't invest - for me - huge amounts of my scarce money at that age. It's scientifically proved that kids don't see risks as we adults do. (That's the same reason why you shouldn't let a 12 year old drive a fast moped in traffic). But that's just my opinion
The OP may be in a different position from me, but at 14, I didn't have significant amounts of money to invest.
When I was 14 I had been dropshipping things from tradekey for around a year, my bank gave me a checking account at 13 and I played the paypal game!
Also came back to bite me because I tried to hide what I was doing (staying up really late to chat with suppliers, selling on ebay, and maintaining a paypal account!) Once I made enough money paypal started asking for a lot more info (suppliers, tax ID number/ss number, other stuff I cant remember) I had to get help at this point, or admit to paypal that I was only 14 or 15...
Don't be afraid to try new stuff, but more importantly don't hide anything. In other words, don't burn your laptop up mining bitcoins unless your parents know and understand what you are doing!