It is great news your portulacaria is still alive. I personally have never seen one flower, but I live in the "great frozen north", where Portulacaria has to be an indoor for winter houseplant. We probably don't get enough sun year round to get blooming.
Hopefully the system won't be a problem. Overall BNut is a very stable platform as far as most forums go. It is very rarely down. Fill out the rest of your profile. A location, just vaguely what city you are in will greatly help people tailor comments to your growing conditions. So much of bonsai growing is done outdoors, it is important to understand your outdoor climate. And if you grow 100% of the year indoors, you could use that as your location, just "100% indoors" and then advice would be tailored to indoor growing.
Actually we are an international forum, so if the city does not make your home country obvious, add the home country.
Welcome to the forum.