Can you be more precise about what you're wanting of family history? To find out about your own family? Or something more general? (TBH I'm not sure what a night school can really show you that you can't do already!)
If you're looking specifically for your own recent British ancestors (from 1837 when registration was made compulsory) you could start here
FREE BMD -
https://www.freebmd.org.uk/
FREE CEN -
https://www.freecen.org.uk/
(I've transcribed many census and other records for these two).
FAMILY SEARCH -
https://www.familysearch.org/en/
If you haven't already watched these, I'd recommend:
Who do you think you are? (
UK TV series on notable people's family history - it's a bit light and doesn't show much how to DIY in depth)
Finding your roots
(Prof. Henry Louis Gates Jnr - US TV series on notable people's family history - shows how proper research is done and use of DNA testing. I really like this one, Prof Gates is a proper academic and usually gets to the heart of things!)
Note that all these programmes invariably become tearjerkers! It's often very moving when you find real evidence of your forebears and some of the facts of their lives and struggles.
Enjoy!!