1. You must split your coins in 2-3 wallets, to avoid losing all your coins if they are all in one wallet. But then you don't know what types of wallets to use.
The number 1 makes me remember the saying that goes, "Never put all your eggs in one basket." IMO, you are right about splitting your assets into different wallets. The reason I agree with you is because when you have your assets in one wallet, you always have to go online while spending your bitcoin, which can expose your wallet to threats, but when you have your bitcoin in different wallets, you only have to regularly use one each time you spend, which means less risk.
But on a second thought, I also think there is no need to split the asset into different wallets if you are sure you can safely secure your asset in a hardware wallet and keep your phrase in a safe place. If you are going to be holding your assets for a long time without having to spend them too often, then there is no need to split them into different wallets. Considering the type of wallet to use, the forum recommends an electrum or hardware wallet as the safest.
Just like the local currency, when you have a small amount of money in a bank account, you sometimes feel less concerned about it because the money is just small, but once you have a huge amount of money in the bank, like $50,000,000, then it becomes a concern to you, often having your subconscious remind you, "Hope your money is safe in the bank," lol.. that's also how it is for Bitcoin. You become too concerned about your security when you have a huge amount of $$$ in Bitcoin but not only that, one must learn to protect their asset, either small or huge.