There is really a lot of misinformation out there, isn't there? Hopefully AuntJessie's post discussing that hand jobs don't lead to std's or hpv transmission will relieve your anxiety.
You can't get HPV from handjobs.
https://www.webmd.com/sexual-conditions/hpv-genital-warts/news/20190215/hands-dont-spread-hpv-study-finds
Hands don't transmit STDs. I'll give some other links that will help at the end. You should be careful about covid, though. That won't say you're cheating, but you and your partners should both be wearing masks, at least.
Here are some posts from our experts (when we had them) that may help -
https://
www.medhelp.org/posts/STDs/Nervous-about-mutual-masturbation/show/2183476
https://
www.medhelp.org/posts/STDs/Mutual-Masturbation-STD/show/1968429
https://
www.medhelp.org/posts/STDs/mutual-masturbation-sti/show/1858544
https://
www.medhelp.org/posts/STDs/Understanding-the-risks-of-mutual-fingering/show/1516796
https://
www.medhelp.org/posts/HIV---Prevention/Vaginal-fluid-on-hand-touched-inside-of-condom-and-head-of-penis/show/1119533 - read this thread thoroughly. There is an excellent explanation about why certain activities are not risks, and why others are.