First of all, welcome to this forum. You will find a lot to learn here. Apart from Bitcoin you can find many good and best coins in the crypto currency market which can give you great profits in the future. altcoins have given people huge profits in the last bull season .One thing to keep in mind is that it is important to be well informed about the alt coins to choose. It is only then possible that your choice is good and perfect. BNb, Ethereum, Arb, OP and Sui are some big Altcoins having big backup and long term idea. You should do some research on their buying range and should not take entry in fomo.
My advice for newbies is that if they want to make long term investment then choose hard wallet for it. It is a secure wallet for all coins. By the way, people also choose soft wallet and keep their coins there too, but I prefer hard wallet more, because with hard wallet I feel very satisfied