Yep, I do genealogy as a hobby, and been at it since the mid 1970s. It's a lot easier now, with so many records online, and all the DNA stuff. But it's also a lot easier to get led down a wrong path, too!
lorenausuk, I'll see your Dad's one brother, and raise ya! I knew my dad had a sister and a brother. It wasn't until I was almost 30 that I found out he was one of 10 kids! And that my grandmother (on the other side) was one of 12! I only knew about one sister of hers, and a brother, as well!
I've just recently had a DNA match pop up here in Scotland, but haven't pursued that yet. Probably a Donegal ancestor who came over to work in the factories. Happened all the time, at the start of the Industrial Revolution, and then afterwards.