You can import an existing wallet using your private key or 12 word seed phrase, or allow NFT GO to generate a new one for you.
Buy some gems from the gem store. Using these gems, you can mint your own NFTs, by others', and list NFTs for sale.
Mint your own NFT by selecting any photo from your camera roll, and adding the name, description, and metadata that you want.
Once minted, you can list your NFT for sale directly on NFT GO, or on other marketplaces like Opensea and Rarible