My advice - make a pros and cons list to each but don't make a definitive choice. Continue to update the list over the year(s). Explore both fields as potential career choices.
It's still very early in you diagnosis: you'll have better insight on which area you want + fits you better once you've gone through the channels, started meds, took care of urself, etc. It probably feels out of hand right now and messy - but you will get a better handle/grip on this and everything will fall into place. There is no way to predict how you do when BP is managed. And you can't predict how you do on