you have an excellent path as you can truly appreciate fedora only if you've been through ubuntu's abuse i.e. the snap crap. my contention is that fedora should never be the first distro, but the next step, after you've figured out what's what with ubuntu or mint.
KDE don't got "closer relations" with fedora, it's just that you'll get new shit sooner. and fedora is the antithesis of LTS.
the only issue hindering normal, everyday use is rectified by following the step-by-step instructions from rpmfusion (codecs and GPU drivers).