Hi there! Bernina really confused things when they reused the old highly regarded 820/830 designations on a model that didn't go over so well with the general public. It can make it much harder to find the information you want/pertinent to your machine.
I have a modern 820 "sewing computer". The 830 would be the embroidery version. My machine had been owned by two Bernina fans before me, neither clicked with the machine and both are now using 770s I think. Mine isn't a lemon machine and we are doing just fine, but I did need to have a thread sensor replaced which was complicated during shut down from Covid.
In any advent, glad to have you here. If it is a modern one, we have a few fans/users and quite a few fans of the older model.