imo and this it IMO (and imo i was one of these players, you can grind up to 100nl FR fairly easily with the core fundamentals BUT I found and find with other players who are attempting to move up find it difficult to beat 200nl and 400nl. I dont think they have the skills to beat these games yet, I really think you should look into making 6max or HU about 50% of your poker play. you will see vast improvements.

As for coaching I doubt you need it, just watch vids, review and talk poker.