There is a school in Boston just for traditional Irish music.

Could just stop by the Burren on Sunday's and ask

https://www.benwetherbeemusic.com/

Went to college with this guy and he's great!

Ask at Club Passim in Harvard square

Maybe it's because I've played since I was really young, but I don't think there's anything as "Irish fiddle music" in such a distinct sense. It's really fast and imposing at first, but you realize that it's fairly easy to play if you just stick with it. But it's sort of like getting good at certain composers' material. You don't study Bach specifically, unless you're at a really high level. Even then, that's just to give a select few players something to do.

If you haven't played violin before, then any basic lessons will do for a time. You wouldn't learn anything differently, I wouldn't think - unless some fiddle player completely shuns written music or something. And I'm guessing they don't care about form, but you should early on. Fiddle players hunch like no other, but they kind of earned it by playing for a while and deciding it works.

http://www.mariblack.com/ is great.

Further afield in Providence but an option, I know she's an excellent fieddle player

https://www.emmaleeholmeshicks.com/teaching

'tis only one true way to learn fiddlin', and that's for ye to go the great fiddlin' hall of Wenderburry nee 30 dorn outside Kilmarnock and learn from Paddy Fitzburnæácglanock, the greatest fiddler Burney has ever seen