A few ideas for online volunteer opportunities, if you're stuck at home and want to donate time to worthy causes:
Donate your voice or help with validating submissions:
Contribute to Wikipedia:
Contribute to science research projects:
Donate skills to cancer charities:
Various home based volunteering opportunities:
Take part in Citizen Science:
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.