The month of April is Global Citizen Science Month. Unfortunately with the current COVID-19 pandemic occurring globally, many citizen science projects have been put on hold, but there are also many still seeking help.
The Australian Citizen Science Association (ACSA) and the US Citizen Science Association (CSA) have both put up a page about citizen science and COVID-19 with many options to contribute without leaving your house.
For nature lovers, there are two popular apps to explore and share nature, and to contribute to science: iSpot and iNaturalist.