The best way is to buy Ledger Nano S, cause online wallets aren't secure for holding large amounts of crypto.
Ledger Nano or any other hardware wallet is not that necceseery if you understand and know what you are doing in terms of keeping your private key private and secured. Paper wallets can be as good as hardware if you are looking to hold your coins for longer period. Although harware wallets are one of the most easiest options for people without much tech knowledge.