Pre-requisite education resources

[humblenewb]

Hello all,

I'm just a regular citizen who doesn't want to be spied on by their ISP or anyone for that matter.

I got a protectli box with opnsense installed. I set-up the hardware but have no idea how to configure opnsense.

I am very new and want to educate myself on the subject. Could you please recommend resources?

ALSO, if there are very easy obvious things to implement, suggestions there would be most welcome as well.

Thank you!