I've dual booted for 8 years now. It's very handy for me, but it is not without its complications - The main one being Microsoft's illegal anticompetitive behaviour by making Windows regularly overwrite the boot entries, so I have to force a legacy boot to Linux so it can recreate its own entries.

The second one being that Microsoft doesn't abide by its own official NTFS specification, and will mark drives dirty when it shouldn't, forcing Linux to be careful and mark the drive as read-only unless you force it or boot back and make Microsoft re-unmark it.

If you want a Windows-y theme, I'd point to Plasma/KDE for your desktop type. Plenty of themes around too.

Honestly I've not had an issue with hardware drivers on Linux for a long time, that issue is largely historical. Except for nvidia graphics cards, which may prove a bit finicky depending on the model. Hardware which is very recent may take a while if they don't release official linux drivers.

As for software, obviously just check if your software has a Linux binary, if it does they're generally all-distro supporting these days.

A lot of games are Linux native now, but for other Games on Steam with Proton (or the more complex effort of running software in WINE), they have appDBs that list compatibility here: https://appdb.winehq.org/ and here: https://www.protondb.com/

Lots of people do it without issues, but it can sometimes lead to issues, most likely that a windows update overwrites the bootloader and you get locked out of the Linux partition. It's worth trying if you're not sure about it, but you can also just run Linux from an external drive while testing it out, which I might recommend more, although it'll be slower to start up/run programs.

Can't help you with the theme sorry, but I have seen some in the past so I guess it's possible.

The website for each distro often has comparability information, the Arch wiki has a huge amount, which more or less applies to other distributions too.