I’m a fan of the Eb tuning, because I play both classical and folk and because it’s the tuning typically used for single-action harps, but you can tune your harp as you please–no flats, one flat, and so on. Should you need to in future, just retune.
Why should you have to make up your mind? That would be boring to be stuck with only one genre to play in.
Tuning to Eb is the perfect solution. So long as you have halfway decent levers there is no reason not to and then be able to have a greater range of useful keys you can play in. Then you don’t have to pick just one genre.
I was the same way. I started only really interested in Celtic music. My teacher inspired me to branch out to classical and Jazz. Now I don’t even think about genres. If something catches my ear I will give it a go no matter what the genre or origin.
You will get used to dealing with the levers. To me when I think C Major, I automatically think “three levers up” or “all pedals down one”. It becomes habit.