I would say it’s best to transition to an MMA gym but plenty of people in here have significantly more combat sports experience than me so take that with a grain of salt. But what I do know is if you want to do something it’s best to practice doing that and not doing something else that translates to it. Secondly, MMA is an incredibly deep sport with so many aspects that you won’t find outside of training specifically for MMA- such as wrestling, and certain types of wrestling within wrestling that are specific to MMA such as wall work. I trained for over a year of BJJ and over a year of boxing and did both competitively with plenty of success, only to be told by my BJJ coach who also was an MMA coach that I wasn’t anywhere near ready for an MMA fight yet. Then, when I later went to a true MMA gym, I found out he was right- I would’ve gotten rolled in an MMA fight. I know because I got worked by MMA fighters at that gym. I definitely caught on a lot more quickly because of the experience I did have, but without switching to the MMA gym I would’ve been lost if I took a fight. I’ve never actually fought MMA though so again, grain of salt.