I'd also like to hear your advice on which altcoins to trade in, or whether it's safer to trade in BTC.
I don't think there will be any profit without loss if you try to find out which coin will skyrocket in the market. If you can learn risk management and control your emotions instead then it will be more beneficial for long term. I have seen many new traders who fall into the trap of FOMO and revenge trading and want to recover the money they lost in trading overnight. They jump from one strategy to another like a monkey after a while and burn themselves by overtrading nonsense. Not doing such madness is a sign of a decent trader who just twists his hand on a simple and well organized chart. And leave aside all the other shit alts and start trading only spot on big pairs like BTC/USDT, ETH/USDT and mostly big cap alts like SOL or XRP.