How to trasnfer normal key to Steam Key?

Call me old fashioned, but I need some help on figuring out how to transfer my normal access code to a Steam code. I do have a Steam account but I rarely use it, but I do want to switch to the Steam platform in case the old launch system is deleted.

Can anyone give me a step-by-step guide on how to switch codes? Thank you and sorry for being completely incompetent with Steam :smiley:

Automation isnโ€™t yet available on steam, once that is done, youโ€™ll have clear instructions on how to get your key.