@Nickman 1. Use Rufus to write MATE's iso/image on your flash drive. Rufus can deal with writing over the Solus image quite easily. See Rufus help if there are questions.
2. Broadcom wireless drivers rarely work "out of the box" in my experience. See - Broadcom wireless tip
for a direction to get your wifi working.
3. I don't have the slightest idea if this printer is supported either directly or indirectly. Perhaps someone else can answer this question. Good luck Nickman.
Edit: For help with canon printer drivers please read -