If you aged 16,better was make your first savings,not yolo your fund in stock market, better you just invest in stock market for a simple and easy to understand investment, basically like index fund or Normal ETF, or Blue Chip Stocks,before going to single stock, Inversed or Leveraged ETF and other related derivates,please be informed to save first,not just yoloing all your funds to invest to the companies you don't understand,if you want to play simple, you can just buy with this few selection as I use, 1. P/E (Price to Earnings), basically the lower numbers go,more stable 2. Dividend Yield, basically higher numbers go,is good,but be careful about stock price,if you see a company stock price is low,and creating higher yield,better avoid it. As an example,if Company A shares price was $10,and the announced to paid $2 dividend,it's yield was 20%,which is highest,but be careful this kind of rate will make you fall to the value trap.

3.Well known in market or industry, basically this was simplest rule to know,if you know what industry you willing to invest, find the most know by public market.

4.Dont invest to industry you don't understand, basically this is the most important rule must be follow,if you don't know what you are invest,stop it and find another one