Are you working this solo or with a team, and how are your costs for hosting this? I can see it was mostly done with ClaudeCode (or something similar) as the design patterns are 100% AI, which is fine, but means there are limitations.
Have you talked to any users to see if the exercises are legit helpful? Or did you talk with therapists about exercises? or was this mainly AI driven guess work? No shade, just wondering.
On your questions. I'm doing this solo. I'm on a Vercel paid plan, so costs are reasonable (for now) but I've really only shown this to family and friends at this point, so the userbase is tiny.
I have a few family members and friends who are healthcare providers (including those with MD attached to their name) who have provided a lot of guidance. Our friend and family network also includes several with kids and adults on the spectrum, and we have sought out their advice/feedback. But as you surmised, I did rely on AI, specifically for generating all of the media (images/video clips) to fit various scenarios.
On whether the exercises are helpful -- that's exactly the type of data I would love to get, but the site is quite new. If you have ideas on how I can determine that I'd welcome it.