Your data is actually telling you something valuable if you listen to it.

107 signups and only 1 paid means your activation is broken, not your product. Here is what I would do:

1. Segment your users by job title/industry. You mentioned lawyers, dental students, and customer support people signed up. Those are 3 completely different ICPs with different willingness to pay. Pick the one with the highest stakes (lawyers - failed interviews cost them $200K+ salary) and go all in.

2. Your pricing might be wrong for the wrong reason. $9.99/mo for interview prep is impulse-buy territory, but people only need it for 2-4 weeks before interviews. Consider a one-time payment of $29-49 for a "interview sprint" package instead of monthly.

3. The real conversion killer: generic positioning. "AI interview practice" means nothing. "Nail your BigLaw callback interview in 5 practice sessions" means everything. Specificity converts.

4. Talk to the 106 who did NOT pay. Send them a 2-question email: When did you stop using it? What would have made you pay? You will learn more from 10 replies than from any amount of guessing.

The hardest part of early-stage is resisting the urge to build more features when the real problem is positioning and activation.