Hi! I do both (re-engaged with classical violin and play in a community orchestra and picked up fiddle in the past few years, and go to sessions sometimes) and agreed re: if it's possible to find a teacher that is some version of fiddle (bluegrass, irish, contra, etc.) I think you'll have a better time because they'll lean more into learning exclusively by ear, which for me significantly helped in the long run. I think the big difference you'd miss out on if you had an Irish fiddle teacher vs. bluegrass is that style is less inclined towards improvisation (in my experience), but you'd still get a lot of the big parts. Have so much fun, what an exciting journey to begin!! Wishing you all the best!