What do you mean, handle it? Is it the height you're struggling with or the tail or the enhanced senses or something else?
Food tastes different because you've got a far stronger sense of smell and of taste. You can taste more of it, y'know? Plus you're Na'vi now. Some foods just taste different. There's tawtute food and drink that I love when I'm tawtute, like coffee. But I wouldn't go near it when I'm myself.