Upgrading really depends on your W10 machine.
If you were frugal (actually clever for picking a good spec computer) and your W10 computer has lasted you 7-10 years, chances are the hardware is not compatible with W11. If you picked up your laptop in the past couple a years and opted for a better specs computer, it may run W11. If you bought up a basic 10 computer back in the day, it probably won't run 11.
I would personally recommend an new computer. The modern computer equipment is build to operate W11 flawlessly and your new equipment begins a fresh economic life. Adding 11 on a 10 machine always comes with risks, increases with old and cheaper component machines.
Your browser, whatever you use, can remember your passwords and when you sign it to your browser on the new computer, all that data should transfer automatically.
You got this TC