You know when they say buy low sell high, its quite easy as it sound but its not really that easy specially if you haven't tried it before.
Its like foreseeing where the market would do and people does everything to make it happen as they want. They can fud in order to influence the market to their advantage. If you really want to trade, spend only the money you can afford to lose.
There is the glue - buy low (but not on the bottom, wait until price will start to rise - my opinion) and sell high. That's it. Problem is that sometimes you should be really patient and most important is not to jump from one decision to another one. If you buy the coin planning to make 10% profit because you guess it should grow (because of some reasons) than don't sell it in panic if it goes 3% down. If price grow up 10% and still growing - sell half with 10% and monitor the market, put one more quarter in order to sell with 20% and monitor the market still. If you catch the dump stay on and you can make profit much bigger than you planned. But remember that FOMO is bad friend and small profit is better than big loose.
Same time you should understand that trading is a game and as in every game you can win or loose. So decide with yourself before you will start trading how much you are ready to loose, you will be able to accept without suicide thinking. And don't forget to use stop loss to not loose more. Good luck and have fun!