Help please! Plants arriving from Etsy today.

Hi all! I've had a garden for years but am new to indoor plants. I ordered the following:

  1. Alocasia Regal Shield, Starter Plug
  2. Pilea Cadierei Variegated Aluminum, 2" Plant
  3. Calathea Majestica White Star, 4" Plant
  4. Ric Rac Cactus 4"

I know I should quarantine them when they arrive, but is it best to put them near a window so they can get a good dose of sun? How soon can I put them in pots, and what size pots would they be happiest in to start? What should I do with the starter plug? Any other advice? I've been trying to read but feel a little overwhelmed, since I expected these to arrive on Monday. Thanks for your help! I'm very excited to get started.