I have been learning how to trade btc and altcoins by myself and having my experiences. I read online articles on trading signals and what to watch out for. I've made some profits and lost a good deal. Good thing I started with very little capital. Right now everything looks so negative especially as btc went so bearish.
I need advice on how to improve my trading because I really want to do this

From my experience, you should start trading with small balance (<100$ is enough) then invent your own strategy and practice with it. You should read more tutorial about the market signal or expert trader's instructions.
Yes if we want to learn trading we will have to learn it from so many ways as the more we will learn the more we will become expert, so trading is all about Knowledge we can get lots of profit from trading. We can explore Google and YouTube to gain knowledge about trading. Talking with expert traders also increase our knowledge about trading.
Keep learning until to be success with trading in bitcoin or altcoin, push your limit because you can do it and keep stronger with your opportunity when trading, never give up after you lost chance with trading because give many experience how to be success in the next time, when you lost for the first time with trading you still have new way to get much profit again with your investment.