Whatever you do. Full backup first 👍🏻😉
Personally, I’d go with the clean Fedora install on the new drive and copy your data over as someone else mentioned, then expand Windows once you 100% happy with it.
(I did something similar with WinXP years ago… eventually dropping Windows, so that harddrive just became a data drive)
I tried using Enlightenment years ago - it looked amazing, and then… I found all the bugs, incompatibilities, etc… and it’s lackof progress was disappointing.
I tried Bodhi Linux and even they gave up, creating their own Moksha desktop environment too…