PC laptop help?

How do private citizens get PC support these days? I have a 5 year old Lenovo Yoga laptop that needs to update to Windows 11 and has the update included, but there's something called "secure boot" that seems to not be enabled and needs to be and it's giving me a panic attack trying to figure this out. Per my research, it's something behind the scenes in the startup DOS screens, BIOS, etc. This is not my wheelhouse. HALP. 😭