Hey Graeme,
I’m looking into doing the same.
The whole NFT thing is a minefield of sorts.
Currently, with:
SuperRare: Signed up, however, they are only allowing selected artists aboard for the time being. Full site launch will be next year, 2022.
OpenSea: Signed up and created collection (artwork for the time being, UE4 designs to come later). There’s a lot of coding to do to apply NFT to artwork here, so it’s in progress, though slow.
Rarible: Signed up and minted 2 artworks; process was easier than above, i.e., no coding, though cost a few more dollars than expected.
Yet to sign up with NiftyGateway and makersplace.
How are you getting on with the process?
All the best,
Smudgy
P.S. Please check out: Etherlinker in Code Plugins - UE Marketplace (only just found this =])