Can delay for up to like a year, but generally I've found it to be fairly painless. I definitely do it via the CLI because it's easier to see warnings. It will block you if anything you have installed has issues (often fixed by waiting). Just follow the docs

Been doing it for years :)

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

i'm going to be doing the same thing as you and i've lost count of how many times i've done it.

the cleanest experiences happened when backed up all my data and did a clean installation like the first time. this worked so well that i've been defaulting to it up until fedora 18; when i distro hopped with my linux-first laptops.

i got a cheapo/off-brand windows laptop now and put fedora 43 on it and i think i'll use the guided updater this time. (assuming that's still a thing).