Music Theory will not change this. Learning guitar is hard, just like any other skill. Knowing a Major Chord is made up of a Root, 3rd, and 5th will not put you fingers on those note or help with chord changes or playing songs.
You said you completed grade 1 and grade 2.
Can you play 20 songs from memory, start to finish. If not you haven’t finished either grade and need to consolidate those first 2 grades.
Sorry if this sound harsh but that the only way you’ll learn to play guitar.
Hi Tor,
Take a look at the video below and decide for now who you want to be or whagt you want to learn … in any case, learn to play songs … done with grade 2 and not playing songs yet is really not how it will work … even if it is a few grade 1 campfire songs … but it is now really time to be able to play songs, and use that piece of wood for what it is intended for … Or you have to be an Investor who hangs expensive guitars on the wall for later 
1 tip , learn to play some songs 
Greetings
Learning guitar is not hard.
It’s fun 
It’s only hard if you set yourself goals that you struggle with.
I’d be hard pushed to play a single song from start to finish from memory, and I doubt I’ll ever learn 20 (although it’s something I’m working on at the moment ).
I don’t want to rehash our differing opinions and hope you don’t mind if I repost a link that deals with some of the issues being discussed here. It contains some interesting thoughts.
I don’t quite understand your motivation though @Svenssen. You say you started again for various reasons and you are frustrated at not improving your skills. Do you not enjoy playing? There will always be higher levels you can or will not attain, no matter how good you become. If you’re not enjoying the process, you might want to rethink the whole endeavour.
I hope you find your path
For various reasons is probably a wrong why of putting it. I’m not gonna go into details, but physical and mental health is part of it. I want something else than computer games to use as an “escape” from reality if that makes sense. I love music, i love playing guitar. I can play a lot of song, maybe not by heart but play along. I just think my main issue is how to learn, how to progress, how to move on. I am following the grades on the app and i will continue to do so. I just want to do it “correct” this time. Maybe my mistake is that i set unrealistic goals for my self? Wouldn’t the the first time.
Hi Tor, Here’s a middle argument (from my own experience): If you’re curious about music theory, start with Justin’s course. When you get to a place that it doesn’t seem productive, just set it aside for a while. For me, that was when we got to triads…they’re really cool, and simple in concept, but it’s taking me a long time to learn the physicality of then. So I set theory aside for a while. Triads are coming up now in my playing, so I’m getting excited again! Also, I peeked ahead to some other topics past triads. That’s legit too.
I guess what I’m saying is that in my experience, it’s ok and even good to start and stop. 
Yes sure you can. I think the time to learn music theory is when you need it. There’s no real point in having lots of theory knowledge that you don’t apply or aren’t able to apply. So I use theory as part of my musical journey.
Hi All,
Been on and off Guitar since Covid. Finally have my own place and space to practise! I got up to module 6 last time round. Since then a “Music Theory” app has been launched too.
At what point in the course should I start going through the “Music Theory” app?
You can definitely start music theory and apply the practical elements if you’re already at module 6. Take it easy and slowly because some of it will be beyond your physical learning at the moment.
The theory app is a complement to, not a replacement for the website theory course. Which you choose will be down to your preferred style of learning.
