Yes, there are TWO RHCSA courses on Linux Academy. Both are aimed at RHEL7, which is fine for most of RHCSAv8, but the shorter course has an added section at the end about some (but not all) of the RHEL8 specific topics.
One tip for Linux Academy, watch both courses at 1.25x speed to save a few hours.
In conjunction with the Linux Academy courses, get this book! https://www.amazon.com/Red-RHCSA-Cert-Guide-Certification-ebook/dp/B08171QYYJ
Only $20 for the ebook version, this book covers everything and covers it well. It's also written so you can easily just jump around to the specific sections you need review on. It also has practice tests.
Last tip, I can't share a link right now cause I'm out, of you search you should be able to find it, but there is a Slack channel specifically for RedHat certs, which has a practice exam, a community you can ask questions, etc. One thing I found most useful there is they have an Ansible/VirtualBox/Vagrant based "practice environment" you can download which, in a few commands, will automatically set you up with a couple of local RHEL8 VMs to go wild on.