Hmm, To really make trading profitable requires time and if you do not have enough time then my recommendation is you should Buy and Hold because this is the only way to make profitable trades without investing much time, one extra tip does not go for meme coins on buy and hold. Prefer top assets and most of the time Bitcoin only.
Trading is really not that easy to manage part-time if you are not experienced, Also there high risk in trading because when face continuous losses in trades it might make you frustrated, and that frustration can you to actual damage.
Yes, the best thing he can do is buy and hold only Bitcoin but if he can afford a reliable and trusted cryptocurrency trading bot. I will advise him to get one to make his crypto trading more flexible and less time-consuming so that he will only need to focus on the bot setting and market analysis.