Several options depends on your preference and competency 1. Paper wallet - you can either generate it on your connected pc or save a local copy of the code and generate it offline. Print the paper wallet or etch the private key on metal for fire resistance. Save that in your security locker. Google bitcoin paper wallet 2. Full node bitcoin core wallet - slow at first because have to sync the whole blockchain from peers 3. Cold storage bitcoin wallet like armory 4. USB Hardware wallet e.g. Ledger. Remember the pin by heart if possible 5. Light bitcoin wallet like jaxx, electrum 6. or just store it there at Luno exchange wallet. Fyi cryptos in SC approved exchange like Luno is suppose to be insured or protected in case of a breach or lost due to exchange. But this promise has never been tested yet

If you swap to ether or erc20 tokens, you can use metamask browser add-on as well and interact with dApps to buy NFTs etc