I think you have to do your own research by continuing to learn and of course asking lots of people who know about crypto, and joining you in this forum is a good decision.
 in my opinion, choose bitcoin, if you already know the knowledge, then you can try investing in it
altcoins, but in my opinion investing in altcoins is indeed a high risk.
so even if you invest in altcoins, don't invest all your money in altcoins, the most you can invest for altcoins is just a small part, yes, around 25%.