I would go for something that has the same weight as a puck at least. You want to be able to cradle the passes so you can get a feel for receiving the puck on a pass. Nothing is a replacement for ice time, but the following can really help your coordination.

A couple things I'd recommend: Swedish hockey balls, green biscuit (works perfectly on smooth concrete), shooting pad with a self passer.

https://www.amazon.com/Hockey-Revolution-Swedish-Stickhandling-Ball/dp/B01MPW2FKT

https://www.amazon.com/Green-Biscuit-Training-Puck/dp/B003O9VWHY/ref=sr_1_5?crid=2ZVED7IT3XHS&dchild=1&keywords=green+biscuit+hockey+puck&qid=1617537951&s=sporting-goods&sprefix=green+biscuit%2Csporting%2C134&sr=1-5

https://www.amazon.com/Hockey-Revolution-Shooting-Board-Passer/dp/B01ED0PTH6/ref=sr_1_10?crid=2GOHBLEX3OORK&dchild=1&keywords=hockey+passer&qid=1617537982&s=sporting-goods&sprefix=hockey+pass%2Csporting%2C139&sr=1-10