How funny, I'm so excited for you two!! Same thing happened to my mare and I.
Up until my Senior year, we weren't too competitive in a lot of events, especially gaming events...most especially pole bending (she liked to do a roll back either before, or into her end poles, smh.) So that year, I patterned her over and over until she had each pattern perfect at any speed, except actually running them all out. Well, the first meet came around and I thought "what's the worst that could happen?" So I opened her up and pushed her. She surprised the heck out of me and my coach! (Who regretfully had me as jv, so she didn't get any team points for year end high point lol!) Then came time for poles, again ran her as hard as she would go. Funny thing is, that habit of rolling back at her end turns, ended up being her strongest point in poles. It set her up for the tightest and most beautiful weave. Needless to say, I walked out of the pole bending arena as district champion all 3 district meets, as well as canadian flags. We qualified for state in quite a few events that year, all because I trusted my horse to do her job :) So, you and Selena will be awesome, I just know it. I don't think that she will let you down, you've done a lot of great work with her.