I love that since you have been practicing you want to continue to become a teacher. I think that comes from this place of loving the practice and what it offers so much that there starts to be a deep want to share that with others. I had been practicing for a short period of time when I did my first YTT and I went into the training with the goal of just wanting to deepen my own practice. The month after I finished I quit my corporate job and started teaching full time. LOL! Here's what I can share from my experience. The best teachers teach from their heart and soul. Their words and the way they guide others comes more from a place of providing an experience for others. Yes, there is knowledge that is transferred by knowing how to get into the poses, but the best teachers will guide students into their own body. As a student I am less interested in whether or not my teacher can touch their toes or do a handstand. I am pulled towards the ones who are powerful in who they are in that moment and want to invite me into feeling into my body. As a teacher myself, I continue to have a drive to work on the poses that are difficult for me, but I do that by showing up for my practice. YTTs are amazing, expansive experiences and if something in you is being called towards one then I think that is the call to answer. The most transformative YTT I did recently promoted self-confidence, self-healing and personal power more than how warrior II should look. No pre-study needed in my opinion. The yoga always asks for you, as you are in every moment.
Hope that helps a little! Wishing you the best as your yoga journey unfolds!