Web Dev – What after MERN stack?

Hi everyone! A bit background info about me: I am CS grad student who is pretty good at a few programming languages like python, C, Cpp and JavaScript. I want to make a career as full stack developer and in that journey I have so far learned MERN stack i.e., MongoDB, Express, React and Node through courses. I tried creating my portfolio website and I am able to do it without much difficulty in React.

However I am extremely confused as to what I should learn next after MERN?! Do I learn devops tools like docker, jenkins, ci/cd or do I learn cloud like AWS etc or do I learn tools like kanban, jira etc. What are the next things I need to learn!? I have no idea..shall I build some project and make my resume good before I learn anything else? And how do I build industry level projects? Should I do guided projects through courses and put them in my resume or if i am to do on my own how difficult would it be to make an industry level project and how to do it.

Lastly is it the projects I need to do now or is it devops or cloud or something else. I am extemely confused and would appreciate your input and suggestions.

Thank you.