Hang in there dude, I'm new myself and have made great strides when it comes to form, distance and accuracy. Don't think I can really link my progression to any one piece of advice or video. Take it all in and try to apply it in practice, and don't get discouraged by the results.
I can tell you it wasn't easy and was definitely frustrating at times. (who am I kidding it's still frustrating lol) When starting out I hit a wall quick, couldn't throw over 160ft, had zero accuracy and my form consisted of running like a mad man and hurling a disc. I spent a lot of time adjust my form and grip, and it took me probably a better part of 3-4 months until it just clicked. All the videos and articles all started to make sense and I could start to apply some of that knowledge. I wasn't throwing 300 but I was able to throw 220's with good accuracy and something that resembled form. At that point I switched from fairway drivers to mids, with tons of field work and tons more reading I was able to throw a mid 300ft with very good consistency. But this doesn't mean I don't have day's or weeks where I feel like I could throw my bag further than my discs, in fact I know I could throw my bag further than my discs this week. It's just a matter of rolling with the punches and having fun. It will come to you with time,I am the furthest thing from an athlete, I am just a dude that likes to throw plastic into trees and occasional metal baskets.
P.S. Most of my disc wobble issue came from my grip, does the disc feel comfortable in your hand or awkward. If the answer is awkward, switch it up try a stacked grip or three finger power grip. Find what works for you right now, then work on refining the tried and true methods. I switched from 4 finger power grip to three finger power, to stacked back to 4 finger before finding stacked was the perfect grip for me. Also try throwing mids instead of putters, I still have grip issues and wobble with my putters from time to time.