Welcome to rootschat from me too.
To add a little more (apologies for any repeat advice) ....
Don't assume that because your ancestor was John Smith born around 1890 in London, that the John Smith you find on a website is
your John Smith. You need to cross check other identifiers if possible (place of birth, occupation etc).
On the other hand, keep in mind that there was a lot of variation in spellings. Many people couldn't read or write and there can be many different ways to interpret the spelling of some surnames.
Don't think that because you find someone's tree on the internet and it has some of your ancestors in it, that it is correct. There are loads of mistakes on loads of trees.
It is easy to get muddled especially when if you have 3, four, or more generations of ancestors all called John Smith, who are all married to women called Ann, who all live in the same village, and all have the same occupations .... not to mention cousins also called John. You will find a system that works for you, but I find a visual representation helps sort them out. (I start with pencil and paper)
Definitely ask for help here whenever you need it.
