Since you need to stay indoors for a bit, you might try the Outward Hound Tail Teaser Durable... https://www.amazon.com/dp/B0042I5G2I?ref=ppx_pop_mob_ap_share I use this with my English Lab on days when it’s too miserable to go outside. It’s also a good way to burn off some extra energy before a quick training session. And it’s both mentally and physically stimulating! A 2fer!!! I swear 10 solid minutes of this toy is like 30 minutes of fetch in the backyard!
There is plush puppy you can get on amazon that has a battery powered plastic heart inside of it (you can remove it) that beats and reminds the puppy of being with it’s mother or litter mates. It also comes with a heating pad too! We are only 2 weeks into our puppy adoption and I’m feeling very overwhelmed too, but this toy has been the first thing our puppy will entertain herself with with out us being around!
Here is the link:
SmartPetLove Snuggle Puppy Behavioral Aid Toy https://www.amazon.com/dp/B000C9YHFS/ref=cm_sw_r_cp_api_i_Ll8aFbC2EDF5F