I always read about public keys,private keys and speedphrases that you need to store them in a paper wallet or hardware wallet. The only thing I ever stored are the passphrases (those 12 or 24 words) I get from metamask or other wallet provider in the beginning of creating a wallet. Is this enough when I write them down and secure them?
There are good crypto YouTubers out there, like Benjamin Cowen, he doesn’t even run ads on his videos.
There’s also a guy that does whiteboard explanations (can’t remember the his name), but if you search on YouTube for crypto whiteboards he might appear.
Anyways, I’m gonna give my last two cents to you, so just remember this about crypto investments, no one knows when crypto will actually go up or down (“no one knows shit about fuck”), do your own research, mainly invest in the top 2 cryptos (BTC and ETH), don’t diversify too much, learn about one specific crypto niche or blockchain network that’s fun to you and you really like (like L2’s protocols, gaming, AI etc.) and invest maximum on more 2 to 5 different alts (alt coins - other coins rather than BTC) if you have extra cash apart from your main holds (BTC/ETH) and you will be more than fine.