[throwaway435675]

Probably going to depend a lot on what "Computer Science" means to you, as that tends to cover a lot of different things. I'd start though my spinning up a "dev box" somewhere(Digital Ocean, AWS, Azure, etc), so that you can remote in from the work desktop and have a clean environment to build/program in. Having a remote workspace will allow you to login and immediately resume what you were doing, which could help a lot in this scenario. Just this bit alone will get you familiar with a Cloud Provider, SSH, and the linux command line.

Then as much as I hate it, you should take a project manager style approach. Decide on what you want to do(build an app, make a website, etc) and break it down into small task that you can complete in 5-10 minute chunks. This will let you chip away at something and you'll know quickly how much you have left. It also builds really piratical time management skills which will be helpful later in life. Just start with what you want to learn.