You should know about the ways you can donate computing power to help with scientific research (including COVID-19 research): BOINC and Folding@Home

Do you have a computer? Great! You can use it to help humanity by running scientific calculations on it when you're not using it! There are two major platforms, BOINC which does all kinds of science from medicine to physics to astronomy and even non-science ones depending on which projects you decide to contribute to, and Folding@Home which mainly focuses on protein research, both maintained by prominent universities (but serve scientists all over the world). Simply install either client (or both), and follow their instructions! You can set conditions for when they can compute so as to not conflict with your own computer use. It's completely painless and allows you to donate both CPU and GPU power!

One piece of advice I have is to be careful when running them on a battery powered device as the heat generated can damage the battery. You can set limits on how much processing power is used though, and there are even third party tools at least for BOINC that can limit computation by system temperature.

Finally, about COVID-19 research. Here are the projects available on BOINC that deal with it, and this is Folding@Home's information page on its involvement!

If you have a PC at all, whether it's considered powerful or not, I implore you to install at least one of these and donate its unused computing power to scientific endeavours, COVID-19 research is especially in need right now! Every contribution counts, no matter how small!