Bitcoin and a couple of alts (ETH, XMR) have quickly become a huge interest of mine - after reading and thinking for some time I got in approximately 6 months ago, approximately 80% in BTC. Since I truly believe in the fundamentals I will definitely hodl the majority long term, buuuuut I am also tempted in adding some extra money for more frequent trading. Any gains would go to hodl... So far my most advanced strategy has been ""buy when it feels low"" (which has been accurate about 33% of the time...), but I would like to improve somewhat and both buy/sell with the new money I'm planning on adding.
Where should I start? What should I learn about? Even though I'm somewhat sceptical towards TA, does it work? Should I learn more about ""trading psychology"" and try to play bear/bull sentiments? Should I slowly start getting my feet into margin/leverage trading? Other advice?

Unfortunately (?...) I don't have time for fullt time day trading, so my goal is to be moderately active.