There are quite a number of helpful videos and articles in trading.
Read, watch, listen, learn your craft.
Invest in knowledge, as that is the only way you can improve.
Then practise, this could preferably be demo, and take this as seriously as live trading.
When you are indeed ready to go live, start small, regardless your level of capital. And grow gradually.
Yes, the theory of trading is always useful but you need also the practice. Do not start with the large sums of money. Pick different cheap but good altcoins and invest in them.