The comment was not meant to piss you off, mate. Without knowing that you already use Linux, AKA a "Newbie", it was a valid reply, meant to assist you in understanding the differences between the two systems. Welcome to the group! I would vote for Xbuntu.How many times people is going to say that Linux is not Windows? I f*cking know it.
One thing I have noticed, on Legacy kit, is that youtube videos play much better on the chromium browser, than Firefox, it seems less demanding on older hardware. Just my 2 cents worth. Try both, and see which works better for you.