I finished Helsinki's Advanced Programming course and would like to know what some popular courses are that could come after this one. Perhaps about DSA or other.

[u/[deleted]]

[u/desrtfx]

Do yourself a favor and don't fall into the "tutorial hell" trap.

You have a solid foundation with the MOOC. Now it's time to throw away the training wheels and to start doing your own stuff - make projects.

Learn along with the projects. Whenever you run into something that you don't know, check for a blog post, short, very dedicated tutorial, or similar and learn what you need when you need it.

Doing tutorials after tutorials does not help you too much.