Do you ever enrolled online dev courses on udemy or platforms like that?
What's your opinion about these courses?

I want to learn Angular, I bought a course on udemy but i don't know if they're useful or not

I bought access to a course for advanced usage of Wireshark yesterday on udemy.

Didn´t actually start it yet. Just looking through the extensive amount of topics being covered I´m thinking that it´s a bit too much for what I want to use Wireshark for. (10,5 hours of videos alone, holy crap...)

But well I had a coupon for the course.

Will se if it was worth it.

If u want well structured content/outline then subscription based online courses would be good. If u don't want to pay and if u don't mind googling around then there are a lot of free tutorials out there.

I bought a course about VueJS on Udemy and followed it, learned a lot of useful things, but it also depends of the teacher.

I'm going through another course about Flutter from the same guy, it's quite good too

Heavily depends on the teacher. I used the course on machine learning over at coursera to get up to speed on ML for my thesis and that one was pretty good overall (some minor things here and there, but that's true for just about any lecture).The course itself is free, if you want a certificate stating that you did the course, thats 80$, which seems fair enough to me. (I didn't get the certificate, obviously)

I really would advise thinking of a small project, deciding on features and starting to implement it.
Whatever you don't know look it up. That's the best way to learn something imo.

Also do the quick start guide of angular first.

I don't think it's useful to learn the advanced concepts that are maybe used very infrequently in a real world application. If you need them learn them. Otherwise just get going and start building things.

And have fun. Because really it's so fun.

I have tried a few udemy courses in the past and I was disappointed.
I find Coursera to be a much better place

I've had very good experiences with Udemy. After getting more comfortable with Python I ran out of materials to learn next as approx. 94% of the stuff online is "Hello world!" level stuff. Went on there and found a course that gave me the info I needed to satisfy my needs. :) Also got a course on C# in Unity, it's fun stuff.

If we look hard enough we can find great stuff on udemy I think, try to get project based courses in which you can adapt it to a personal one to add fun to the shit.
I Learned a lot of things like this ! Good lukk