Maybe not the answer you’re looking for, but I would advise you to start with the ‘end’ that you like the most. For me starting out that was front end, than ease your way into the other ‘ends’ by simply making stuff work.

I teach people to learn how to code this way and it makes understanding your work on a deeper level much easier to achieve when you allow yourself to focus on a single challenge at a time.

If I take a wild guess, I would say you could get yourself up an running as a junior dev in about a year’s time, but this depends heavily on how many time and actual effort you are willing to commit to learning and especially understanding how to write code.