Adorable.
The rectangle can be made in a few hours.

I have made rectangle yarn animals before and they’re super fun:
Jumbo Amigurumi Bunny - Super Simple!.

Recommendation # 1:
Directions don’t state to work a ch 1 at the end of each row.
Work ch 1 before the turn at the end of the rows.

Recommendation # 2:
secure the neck cinch with yarn vs rubber band.
do the same for the ears.
Rubber bands break are a safety issue.

Recommendation # 3:
Secure arms and legs with a few stitches to keep the bear assembled.

Embroidered face features.

Tons of obnoxious ads to deal with on the design site, but one can copy the directions separately. The how-to video on the design site is very useful.

Small one, 4.0 mm hook: ~ 100 y
Larger one, 4.5 mm hook: gauge 14 st 14 r / 4”, ~ 125 y