+1 for what Salvatore says.
This becomes addictive. I took out an Ancestry subscription maybe 12 years ago, and I'm still at it, although the pace of discovery has slowed to a crawl.
But, be aware that you may well find things that others in your family would rather you didn't.
I never got to the bottom of why my (staunchly Labour-supporting) paternal gf left his coal mining village shortly after the end of the General Strike and took his family and started up a new career, unrelated to mining, miles away in a town where he had no connections at all. My father rarely mentioned his numerous uncles, aunts and cousins back in Derbyshire.
My mother's side also seemed to have some components that I was not encouraged to delve into, and now it's all too late.
So, there wil be highs, but there may well be a few lows. Be careful what you wish for!
IMHO, the Ancestry sub is worth it, not only because of the information it brings, but also because it links you to other researchers into your family, and you pick up information from them.