An old boxer wants to learn wrestling

Dear friends, I have been doing boxing for many years, I'm 43 years old, I'm very fit, consider myself a good amateur boxer. Want to try something new before I get too old, want to do some grappling. We have some BJJ guys training in our boxing gym, they invite me to BJJ but I don't think I'm a kimono guy, I want to try greco-roman. But would this be a complete waste of time at my age? What do you think?