Please add me to your ping list.
Personally, I’m really frustrated that the cruise lines don’t make any effort to let you know what’s going on. We rescheduled a Danube cruise for this June on Viking. It ends in Passau, Germany. I’ve read that Germany is going to require a vaccine, which means I’m not going. Also, we were going to stay in Prague afterwards, but Americans can’t travel there for the time being, either. Should I just go ahead & cancel or wait for them to send a notice?
The cruise lines will require in most cases a 90 day in advance of the trip, full payment. You don't have much time.
If I personally was going to spend more time over there which you appear to want to do, I would cancel the trip before the Line gets my money and I have to deal with getting a refund. June is not that far away, and countries keep changing the rules on Covid-19.(as do the cruise lines)
Others may feel differently from me about cancelling your June trip. -Tom