Hi @ukolacha,
I think Unit 1 would work very well for your students. It is one of the most flexible Units in CSD and is very hands-on. There are tips in the Differentiation Guide for modifying and adapting the curriculum and the last page describes the multiple alternate lessons for the first chapter of the unit that can be adjusted to best meet the needs of your student. Although the intent is that the alternate lessons be done as a team, I think it is doable that at least some can be done individually. I also think it is worth reviewing the lesson modifications for virtual and socially distanced classrooms. There are many tips in those documents that could work for your students.
The Differentiation Guide also suggest searching the forum and I highly recommend this. You can search the forum for just Unit 1 topics. For example, this resource that might be helpful for your students: What is a computer - virtual version.
I hope these ideas are helpful to get you started. Others may have additional ideas or resources as well.
Michelle