I would not recommend day trading unless you have a software to do it, or have a really big capital. It's just not worth the time and effort personally. Also, with fees for each trade, I don't see it being as profitable as just holding onto the coin long term. Highly unpredictable and requires a ton of luck and knowledge for it to be successful. I'd stay with investing.
I'd also not try to do it by hand, especially with all the technical analysis voodoo that people come up with. Spend your time rather on researching low market cap coins which might become similarly successful as competitors and you have high chances to get nice gains.