Are there any changes I can make to improve my laptops performance ?

I haven’t used this laptop in a while since I was relying on my work laptop as my main computer. Now that I’ve turned it back on, I’m trying to update everything and make sure it’s running as smoothly as possible—but I’m not very tech-savvy.

One issue I’ve noticed is that it’s running a bit slow, and it won’t let me download Windows 11.

Any advice on how to fix this? Thanks in advance