During at home learning a few years ago, we stayed consistent with the rest of the district and used Canvas at the 4K level.
We worked hard to make sure it was easy to navigate with images as buttons (see homepage) and using consistent emojis with text whenever we could. Logging in was also facilitated through ClassLink quickcards, so students could easily access this page with a Chromebook.
As students became comfortable with the navigation of Canvas, teachers assigned a 'daily check-in', where students could record themselves answering a question or prompt. This was done daily for consistency. The teacher would record directions as a video, and then we had specific directions (assuming there was an adult supervising students). See "daily check-in".
Now there are more options we could utilize, including image-based quizzes, and built-in annotation of PDFs in assignments.
While Canvas can seem intimidating for our youngest learners, we made the best of our situation and had a lot of control over the environment that we curated for these learners that worked for them best.