What is the best control processor to learn SIMPL on?

Hey y'all, this is my first post here. I am relatively new to the AV scene. I have access to CTI and other Crestron resources to learn from, and I'm currently on the Commerical Technician track. Since I am still in college, I feel like learning SIMPL can only help me in my job or potentially expand into another role after I graduate. This would be the first programming language I would learn too. What would be the best control processor to use to learn how to program in SIMPL that isn't too overwhelming? Thank you!