maybe getting a hamster?

hi! i’m looking into getting a robo hamster, i currently own a 40 gallon tank which is around 36x18x18, i was wondering if that would be okay for a hamster? it’s a double door front opening but i was planning on blocking it off and locking it so it would open from the top. i’m also not sure how big of a wheel
i should get, ive heard 10 inches is good for a robo but im not sure. any tips would be helpful!!