In my experience, Mint is very good starting point. In the long run you might want to jump to something different once you’ve figure out what you actually need and what gets in your way. For instance, Debian is know for its stability and old packages. Fedora is know for getting new stuff really quickly, but that also means that things change quite frequently. Arch is know for having even newer packages and giving you a lot of control over your system.

Dual booting is also a good option for now, but in the long run you may run into annoyances such as a particular Windows update breaking the boot sequence. In the short run, that’s not a big risk, but in the long run you might want to erase the disk completely and make it a 100% Linux system.

Your 3070 ti should work well enough with Mint, since it comes with proprietary drivers. However, you should know that there’s very good reason why the image search “Linus Torwalds Nvidia” gives you a very specific result. Try it out and look into the history of that thing. You’ll be switching to AMD or Intel very soon after that.

For the time being, I don’t think you have anything to worry about. Just some minor tweaks to be aware of, nothing too big.