Classes, lectures and group work continues despite the current crisis as much as possible. And although it is not always perfect, it is better than nothing. It gives some structure to the days that all seem to flow into one-another at the moment. The fact that everyone is now following classes at home also gives you an opportunity. Your roommates or siblings might have told you about what they are doing and studying, but to be honest: you never really understood what they are actually doing.
So, just join one of their lectures! It gives an opportunity to expand your knowledge, show an interest in your friend/family and have something to do for another 2 hours today.