Official Previews: Reputable studios typically offer promotional galleries or teaser images on their official websites. These are the safest ways to sample the quality of the work.
This series focuses on demystifying the path from a total beginner to a working professional in the creative/business space. The "Day Zero" Checklist: studio gumption rookies free
Since I can’t browse the live web, I can’t give you the exact current wording from their official site, but here is a of what such a text typically includes for an animation/art studio’s “Rookies Free” initiative. You can adjust it once you check their actual page. studio gumption rookies free