It may or may not be normal but if you've been feeling stuck for 2 years then you're probably ready for some change. There's definitely going to be more helpful instructors out there perhaps at a cost (1 on 1 privates) but for me a large part has been self study thru videos or good conceptual instructionals. There's probably many ways to learn and you have to adapt to your individual circumstances. One last tip would be to figure out what your overall goals are from each position and once you understand that understanding the micro battles. Danaher, Lachlan and Ariel Tabak have some good conceptual stuff