Just my thoughts on this question.

To me it's like " how long is a piece of string "

I think you've gotta ask yourself what you actually want to do/learn.

My journey thus far is slow going but already mentioned about the Anders quote

" Make sure you have fun"

I wanted to learn lead guitar when I 1st joined this site, although thats still a goal of mine , I've since learned a ton of songs that I can play all the way through with chords.

Unless you have unlimited time each day, you have to have a practice routine of what you want to concentrate on.

Sorry for long post