There's a few of us on the forums and in the clan that could probably talk your ear off on it with various opinions and ideologies on the topic. I will not name names out of respect for privacy One thing I think crypto investors can agree on it that Bitcoin would be the 'gold' standard and I'd suggest reading up on it prior to investing.
Michael Saylor, CEO of Microstrategy is one of more prominent voices in the space and if you watch some of his interviews or the 'masterclass' videos out there. You'll learn a lot of the case for Bitcoin. What you will not hear from him is a possible use case for alternate coins (Ethereum, Solana, et al)...
I'll post just the Youtube links and try not to embed the videos to shorten the response:
Philosophical and lengthy series by Robert Breedlove - https://www.youtube.com/watch?v=4rvTppy1qLI&list=PL2jAZ0x9H0bQFY6wIbQfnrnIlqMcSHd6X
Microstrategy site for guidance and resources - https://www.hope.com
To answer your inquiry, you can open up what is called a hot wallet with an exchange such as Coinbase, Crypto.com, Gemini, FTX. Only keep what you want in your hot wallet what you are comfortable losing should there be a devastating hack on an exchange. If you're not comfortable losing any of your money (ikr?) and increase your holdings and positions, I'd recommend obtaining a cold wallet - a physical device to transfer your crypto onto.
Here are a few hardware wallets I can attest to:
Ledger - https://shop.ledger.com/pages/ledger-nano-x
Trezor - https://shop.trezor.io/