Power App Trainer

I am looking for an experienced Power App trainer to help me build up my knowledge in this area. I have chosen formulas and calculations as the main learning focus, and my current level of experience is at a beginner's level. I am expecting to have 4-7 training sessions in total. The ideal trainer will have extensive Power App experience and be capable of providing me with the instruction needed to move to a higher level of understanding.Each session should focus on specific areas, explain the concepts clearly, and emphasize practical application. As the trainer, you should also be able to assess my progress and provide any appropriate advice or guidance.
I look forward to hearing from someone who can help me gain a better understanding of Power Apps.