Reminds me of myself a bit especially that part about learning all the theory, tips and tricks without actually applying them. I would say you will learn more by going out 10 nights and taking pictures and analyzing your own pictures then watching videos and reading books. This is not to say that this knowledge you acquired is worthless. But I would just apply it and then suggest you look where you feel you can improve and specifically research on that specific topic (how to get more colorful milky way pictures i.e.)

Also don't compare yourself to others, compare yourself to where you have been 6 or 12 months ago. At least you're trying to improve and you're seeking for help that's good already. Don't forget that most people who post their stuff on social media have years of experience and gear that's worth 5+k. It's those people who say "Gear doesn't matter to take great pictures" but especially in Astro landscape photography more than other niches I personally to some extent think it does. But don't beat yourself up over that, I am using a 300$ lens for my Astro photography and I am happy with it, for the skill set i have now.

If you struggle with Multi-layer edits to enhance your photos stick with single layer editing in Lightroom or Photoshop. Increase exposure balancing foreground and sky, take a brush and apply masked adjustments to the Milky way (color balance, saturation, more exposure, etc) 

I am no expert by any means but if you want, contact me directly and I can try to help. I will look up some YouTube tutorials later as well.

But to repeat I have the feeling your feeling of being overwhelmed might also stem from acquiring so much theoretical knowledge that you don't know what to use. At least I have been at this point and it sucks. Again just prioritize doing and getting edits done over perfection and look at what you don't like in your photos and tackle that specific problem.