Am I going down a right path?

Hello everyone! So earlier in the year I decided I want to switch majors from biology to computer science. I love it so much so far. The thing is I started learning python but my problem is I was inconsistent with it and I left learning it and just focused on regular school subjects like math and physics etc. I recently came back to learning it and I decided to actually stick to it this time (which I sorta am). But a few days ago I learned HTML and now I’m learning CSS and after that I’m thinking of taking JS and coming back to python later or learning python with it. My goal is to become a full stack developer but I’m just worried that I’m doing too much or too little or not doing it right. How did you start out from 0 to 100?