i decided i wanted to make a short clip with my pet rock toby, so i turned him into a 3d model:

(theres some texture issues towards the bottom of the model, but that'll be hidden 100% of the time so im not too worried about it)
what i am worried about tho is the fact my model doesn't have a bottom:

i haven't even started delving into this myself, i just wanted to ask now to see if anyone had a quick answer: does anyone know of an easy way to fix holes like these? it doesn't have to be 100% perfect cus no one will see it, i just want to connect everything together