You can start with a decent size crew right through the cycle. Avoid any stars (brittles, etc) as they will drop most of their legs. I would get a dozen blues (the reds are too expensive to put in a young tank) and a dozen snails and 2-3 emerald crabs. Maybe even a sally lightfoot (not sure how hardy they are in an early tank). Shrimp Im not sure about and they can be pricy, but snails, crabs and hermits should be fine. Maybe get your first crew at your LFS for $30 bucks rather that drop $100 from here. Then after a couple months, get a full crew with shrimp and stars. Good Luck!