You're OK with the spices, the chilli, salt, garlic, pepper, ginger etc but the takeaways are always a bit more difficult as many smother their dishes with gloupy sugar laden sauces. If I were in a restaurant, I'd go for things like shrimp egg foo yung, duck with prawn meat stuffing, salt and pepper ribs or salt and pepper king prawns but in most cases, things in the thinner sauces, oyster sauce or black bean sauce for example are OK. Defintely avoid sweet and sour, fillet steak in cantonese sauce etc. Try and go for meat and eggs and as little sauce as possible.
Some thin noodles as a side should be OK if you don't eat the whole portion. You don't know what noodles they provide so its best to restrict the portion. Many noodles are OK but you never know what you're going to get and certainly not in a takeaway.
On the otherhand, you could just pig out on the ribs, prawns and chicken wings, the sort of stuff they have for starters. They're mostly served up with chilli, garlic, chives and ginger. Very tasty and carb free. Just avoid stuff which is battered.