I think the beta site you’re looking for is the Betabase but it’s down and looks like it’s been down for quite some time. (Though apparently it goes through phases where it disappears; I guess somebody forgets to pay the bill or something.)
I’d say 97 bpm at 5w6d is great. It’s really hard to know exactly when the heart will start beating (which is why some REs don’t bother looking for it until after 7 weeks), and when it does start it starts close to Mom’s heart rate. Our first recorded hb was only 80 beats per minute and that was right at 6w, and I was afraid for a while that it was too low. (But then, my own resting heartrate is pretty slow.) On Tuesday, that same little heart was doing around 170 bpm.