Pull Up Question

Started to do more pull ups, an exercise I typically avoided since I was a bit embarrassed to only be able to do 3 or 5 (stupid reason, I know).

But now that I'm starting to feel more confident and hitting the gym more, I've been doing dips and bought a pull up bar to do at home.

What are your suggestion/ tips of how many should do a day (or week) to get stronger and do more. And at what point should you start adding weights?

Have you noticed any difference in your fitness or strength after doing more pull ups (any type, wide or close, etc)?