Lots of good advice above and even if you do need OHS at some point in the future, it's a fairly routine procedure these days with far less chance of complications than it used to be - options are expanding all the time and there are newer minimally invasive options that might be suitable like the MitraClip. If it is OHS, you've got plenty of time to research valve types, hospitals and surgeons if you want to but maybe don't jump the gun if that might just make you worry more. It's easy to think the worst with the Internet at your disposal but nobody can say the extent of the treatment you'll require without an echo/TEE and a lot of experience, I apparently had undetected mitral valve regurgitation for 35 years and lived a perfectly normal life until I got endocarditis one day, had I known about the murmur I could've spent my entire life researching things that wouldn't have made any difference in the end.
My MMVR was suddenly sprung on me one day after a transfer from three weeks going rapidly downhill in a different hospital, I was totally riddled with infection, very feverish, hallucinating and not thinking straight at all. The surgeon was almost so eager to get inside my chest that my mates wanted to tell him to back off, but that was just a measure of how serious the assessment was. I didn't get a choice of hospital or surgeon because there wasn't time, the first sign I had of surgery was hearing the ward staff throwing about the word 'cardiothoracic' before my transfer and Googling it, my valve choice later that day came down to 'tissue or mechanical?', I picked mechanical (good choice) and by the time I even knew there were different brands, it was already in and happily ticking away.
So I guess maybe hold off on the Internet cardiology, it's so easy to overreact and assume the worst in these situations and even on a forum like this, everyone has very unique circumstances and no two cases are the same even if they sound that way on the surface. But if it does turn out you'll need OHS at some point in the future, do all the research you can then and hit it head on armed with all the facts and the best surgeon you can find. Good luck!