You have limit time and resources so you need to think what I call "FIRST DOLLAR" approach. If you look across different modes to sell and target there has to be a few that would be the optimal. Focus only on those first don't look elsewhere - put each next dollar of effort into these (or this one) until it's optimal then target the next bucket to attack until you get momentum to broaden.
There has to be a few or one area that would harvest better or best results w you time. The idea here is to get the sales/revenue flywheel turning w focus or richest buckets of opportunity to create revenue momentum to allow you to scale.

1. Partnerships with those who sell into doctors - preferably similar Catagory (tech. IT. Time optimization. Software).

2. Work your customers and fuel the flames of referrals with those Dr using your product. Ask them "is there some one you can suggest that might also benefit from this?" A warm referral is sales gold. "Dr xxx suggested I show this to you".

3. hire college interns.

Congrats on "going after it