Welcome to the Forum.
I can well imagine you feel a bit apprehensive - changes are always a bit 'knee-shaking'. The language won't be quite such a problem as it is for folk who don't speak German at all though and you have your husband here too. Nevertheless there are lot of differences and I hope you get things sorted and and that you both settle in quickly.
As you say, there are plenty of outdoor activities here which you will certainly enjoy.
Don't know too much about events in Bern - have you looked up Activites in the Forum or tried Bern's Homepage in the Internet? Plenty going on even when the football is over! Many Swiss homepages are simply the name of the town or city .ch
Good luck - with the flat too!