Probably in ~2 weeks.
If you install that kernel from koji, in case it causes issues, during system start-up you’ll still be able to boot two previous kernels and remove 5.11.
In case like that it’s best to either ask the source of tweak you tried, find something about error message or post here what steps were made, what instruction was followed and what’s the end result (error message).
If you’re about to tinker with your system, have a bootable pendrive with system you’re using, it can be very helpful in troubleshooting and fixing the issue. Here are updated ISOs Index of /pub/alt/live-respins
If you used default partitioning during Fedora 33 installation, get familiar with BTRFS snapshots, they’ll let you revert system to previous state.
There’s no universal and complete source of knowledge, everything changes quite fast, different distributions vary. Reading some fresh book and then learning more as you go (finding solutions, reading questions and answers here) should be effective.