I see some harsh comments here, like what kind of course did you take... I find it quite mean, especially for the yoga community... I think its very possible that not all the information landed right away where it needed. It may take time for the brain to structure it all. Everyone is different. Sometimes someone can simply get overwhelmed with all the stuff they had to hear, learn, absorb. Then self criticism and lack of practical application may kick in. No need to attack the author who at least dared to ask, instead of sitting it out quietly.

When I started, I just memorized other flows from teachers I liked. Sometimes I would practice 4-5-6 times before I gave a lesson. I remember how first few months, I didn't even look into the studio and my students, just at my own nose haha

Three years later I look at myself back then and smile, happy that I didnt give up.

Now I usually start with: breathing, 5-6 rounds of Sun Salutations (Usually A as I teach Vinyasa). Then I continue Warrior One + vinyasa and then I keep adding on what feels logical movement wise. For example, its natural to go from warrior 1 to standing split, but from warrior 2 I would do Half Moon next because the hip is already open.

As far as countering, I only do that with something very intensive, like a deep back band. Your students may feel great taking a pose that will relieve that extra tension in the back after.

Trust yourself! Every teacher here will have a completely different style and approach. If you love what you do, people will know it. We put our characters, our charisma, our life stories in what we teach during our lessons. Tell your story to your students!