The main thing holding many mid level players back from breaking through the plateau is lacking to review their games. Gaining more than surface level knowledge about match ups and seeing the effects of your actions will build your skills up until your actions are purposeful and thoughtful. This coaching will include timestamped notes about specific interactions, and end with a general break down of things to continue doing, and things that need to be improved upon. I recommend submitting games that were close, and from some kind of competitive bracket(although not required, highly encouraged)