Because I stepped onto this path without a teacher and practiced in relative solitude for a number of years, I find myself moved to make several comments. One is that if your heart tells you that Theravada is your spiritual home, as mine did me, then I feel you should honor that. However, this does not mean judging and avoiding all other opportunities for fellowship on the path that might be helpful to you. During that time I attended a Zen retreat and also a Tibetan workshop and I continue to read widely. I keep in mind a teaching...someone may know from where, I'm sorry that I don't...that one should not be attached to anything. And that includes the idea of being a Buddhist. I expand this to think that attachment to a particular school is also problematic.
Keep a sure sense of your intention, practice with diligence, know your mind. Teachers come...online, in books, in friends and children, and sometimes where we think we are seeking them, that is, in the person of some "teacher" we meet on retreat or at a center. Everything is teaching us, if our hearts are open and we are rooted solidly in dhamma.
Wishing you well.