First, do what you want. I suggest that if you find some spare time around what sounds like an already tremendously busy schedule, then do some practice on your own. I can’t imagine being able to, but maybe you can. You are a black belt, you ought to be able to guide your own effective practice sessions. If you can’t find any time to do that then you have your answer, it’s not the right time to get active in martial arts right now, you are too busy.
There is another issue, and that is the reality of Covid. I honestly cannot See any sense in any decision to hold group sessions, indoors at this time. We are not yet in a safe place with the virus, even if you happen to live in a place like Texas or Mississippi where all Covid restrictions are being dropped. Seriously, that is a major bit of asshattery on the parts of those governors and there is a very good chance we will all regret their negligence.
So if you are considering an indoor, group training environment, I highly highly discourage that right now, even if your governor tells you it’s ok. If the arrangement is small groups, outside with good distancing (well more than six feet as it is likely you will not be able to wear a mask all the time) and mask protocols for when you are otherwise as close as six feet, and all the participants are committed to adherence to that protocol, as well as responsible behavior at home and at work, then it could be safe. If you don’t like your old teacher, go to a different school. That part is an easy decision.