While Fedora somewhat recently made system upgrades possible through the GUI, it didn't work when I gave it a go. But I've been a Fedora user since Fedora 32, so I tend to prefer the terminal anyhow. Here are the terminal commands to upgrade your system if the GUI acts up for you:

• sudo dnf update --refresh
(Reboot if drivers are updated!)

• sudo dnf upgrade --refresh

• sudo dnf install dnf-plugin-system-upgrade

• sudo dnf system-upgrade download --releasever=44
(Adding " --allowerasing" to the end if you get errors fixes nearly all issues in my experience. Just be sure whatever it remvoes is something you can do without.)

• sudo dnf system-upgrade reboot

After the reboot/upgrade run:
• sudo dnf clean packages

• sudo dnf autoremove