I've been trying to figure this out for some time now because I needed an Anchor wallet in order to be able to buy Upland cards from the Atomichub market place and then to transfer them into the game.
It seemed nearly impossible but I finally found a great video on YouTube that gave me step-by-step instructions on how to download the desktop version of the wallet program, to set it up, and to create a new wallet.
I then had to learn how to connect the new wallet to Upland in order to use their portal service to conduct an upload.
All in all it's pretty complex but now that I've figured it out I'll be able to buy up some more of these cards and maybe even some of the ones that have block explorers on them which would be a great way to help me build up my collection more.