It would be best if you'll discover it all by yourself actually but still, you need to be careful and atleast find someone who can guide you. It's not really bad that you invested on the famous ones like crypto and bitcoin. Afterwards, you just need to monitor the price changes so that you'll have the idea when's the best time to buy or sell. There are still lots of crypto out there, don't get yourself stucked on the famous one. Find some other potential coins so that if ever the famous one falls down, you have a back up plan.