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Good job!
Jokes and humor in English comes in all sorts of forms. There are simple ones like "knock-knock jokes", puns, and whatnot that focus more on wordplay. One common one that you'll probably often hear goes like this:
Person 1: "Knock knock."
Person 2: "Who's there?"
Person 1: "Orange."
Person 2: "Orange who?"
Person 3: "Orange you glad I didn't say banana?"
I will say these types of jokes are ones that often make people groan, but the fact that it does is funny in and of itself.
Other jokes include "Yo mama jokes" which I've noticed have fallen out of popularity. I think due to their insulting nature of other people's moms and being more immature they're pretty much mostly told by children and adolescents.
My favorite kinds of humor are dry humor or ones based more on realistic or ad lib dialogue in TV shows. This often involves characters bluntly responding to questions, making an outlandish situation seem mundane, or characters having a casual conversation but the context of what they're saying is funny.
I think that as you watch some comedy shows, skits, etc. and your English improves you'll learn how to crack jokes at the right situations.

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I don't watch much YouTube, but there are plenty of other channels. Comedy can be tricky though, something that is funny to one person could offend someone else. And then there are dad jokes, which are just really bad (not funny). But because they aren't funny, they kind of end up being a little funny. This probably doesn't make any sense. ;)

Search YouTube, there will definitely be some comedy channels. You could also watch popular tv shows/sitcoms, which aren't necessarily jokes to tell, but it might help with learning, shows like Seinfeld, Friends, The Simpsons, I Love Lucy..... etc.

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Excellent. You could try watching some comedy channels on YouTube. For example, The Daily Show.