Most definitely start at the beginning, follow the course structure, move on when either a) you have the lesson down pat or, b) you can add it as additional practice along with the new lesson(s).
A half-hour, five to six days a week is a good start but don't stop there. Continually add/build up the time spent in each practice. Know what you're going to practice each session and for how long. Expand your practice sessions to include GT core lessons, finger independence/stretching exercises, scales, chord progressions, songs and more. Count only the time spent in hands-on-strings practice. Don't cheat yourself and count set-up time, noodling around, breaks, etc.
In the end you will set your own priorities. If you want to learn to play you will find the time and motivation to get the hard stuff right.
Perhaps most importantly, have fun. Don't get discouraged and don't get trapped into false competition with other players or GT members. Guitar is not easy and it's not the same for everyone but if you're not having fun and feeling good about what you're accomplishing then...what's the point? Be easy on yourself but be honest...it takes dedicated work...more for some than others. Don't give up.
ALL of this, IMO. Have fun, good luck.
Check this out;
https://www.guitartricks.com/tutorial.php?input=1652 "How to Practice"
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins