It all comes down to if you think you are ready for to handle the stipulations that come with dating someone with kids, and oh boy is there a whole lot of them.
It is very possible that for a long time the child is going to resent you for being with their parent (this of course is different from child to child and relies on a lot of different factors, but it’s a common thing I have heard)
The child will always come first to their parent (as they should).
There will be a lot of coparenting, so you need to expect the ex-spouse being a large part of your life.
Honestly these are just a few of the reasons I have personally identified that I can’t date someone with an existing child. What you need to do is sit down are really think if these are things you can handle. If the answer is no, then you need to call the relationship because it’s not fair to anyone to stay in it.