First of all you need understand how risky trading is, because if you do not understand it most likely you will get emotional and be illogical when trading. If you think you can control your emotions when trading then study technical analysis there are thousands of tutorial videos in the internet,  You do not need to learn chart reading specifically in crypto currency chart for stock market and forex are okay because all of them has the same concept. Practice by creating a demo account, do not rush creating a live account. If your trade are  winning in Demo account it does not guarantee that it will be the same in the live account but at least you have some experience in trading.
Diversify but do not over diversify i personally have three to five coins for trading but I am holding a few more on my long term. Also do not listen to some random person in the internet all of has their own motive, you will notice this in social media like facebook and telegram ignore them do your own research.