Your age and experience is fine.
The thing that seems out of place is you have 100+ amateur boxing matches at age 24, but you want to become a pro MMA fighter.
Why didn't you go pro in boxing at some point? The same dynamics are in play for going pro in MMA.
I would say think long and hard about why you didn't go pro in boxing over the last six years given your experience. Then be honest with yourself and decide if what needs to change has changed.
Also the same rules of progression apply as with boxing. Before you even think seriously about going pro in MMA, you need to go amateur first. It's definitely not too late time wise. But you are at least two steps ahead of yourself with plans to go pro in MMA when it sounds like you haven't even found a proper gym to train at yet.