The Red Cross has online training courses that are better than nothing. Some of them are the same videos that they show you in their hands-on courses.
It's pretty simple to learn the steps and the counts and then refresh yourself once a year or so.
I did the full EMT cert training in the 90s and then I take the Red Cross courses every year at work. It always surprises me how often their guidelines change, so it really is worth it to do the refreshers. The more often you do it, the more intuitive the steps will be. Hopefully you'll never need to use it.
https://www.redcross.org/take-a-class