I did what I wanted to do (I’m a front-end developer). It turns out there was also a lot of opportunities, so I was lucky!

I like front-end because I’m able to create a whole application (web or mobile), with very few back-end skills (some serverless Node functions, Firebase, etc.). And I like to solve problems for users, so it is a good fit ;)

For a first role, I would say that it is a good thing to have a good understanding of several domains (e.g. front-end + back-end), although I believe with experience it is better to develop an expertise in one of them.

Most importantly: just do what you prefer :)