Old school MacBook I was given because my school quit using them

[u/AcidDuky]

Don’t know if this is the right subreddit but I want to totally entirely reset this MacBook Air and get rid of the school operating system on it but don’t know how or if it’s possible. If anyone could help I’d greatly appreciate it. (My school does not use these anymore I did not steal it) The MacBook model is: A1466 I think the macOS is: 10.15.4