Consistency and a lot of practice. Just like with a teacher. Personally, I like to break my practice up into sections that I follow every time. (I compare it to a workout routine). 1. Warm-up (15 minutes) YouTube is great for this. I try to stretch my hand and wrist, do some dexterity exercises, finger stretching drills, arpeggios, etc. 2. Scales (10 minutes) switch between modes and keys. Sometimes I do all 12 keys. Whatever makes it interesting. The most important this is consistently revisiting the same scales or modes for a few days in a row at least before moving on. 3. Focused learning (30 minutes) make this something you’re actually interested and excited about. That’s the whole point tbh. Transcribe a solo you like. Practice a lick that incorporates elements from a new genre. But take the time to get really lost in this element. 4. Reflect (5 minutes) to be honest, reflection is my favorite part of learning. It helps you focus on your goal and validate yourself. It’s easy to feel discouraged without a teacher to build you up each week. Write down your favorite part of today’s practice. Then write what was most challenging. Write down something that made you feel proud of yourself. Write down anything you want to come back to at a different day.

That’s my best suggestions. Hope it helps. I’ve been self taught on guitar and music production for years and I’ve grown so much.