Evaluating GC's contract

[Mat Zalk]

Hi all, I am a new investor in the Denver metro area and am doing a bit of work for a home that I bought a few months back (demolition of a back area of the house and its subsequent reconstruction). I've found a general contractor and he's written up a contract for some work that needs to be done. It looks a bit amateurish and I was hoping to get a professional (or experienced) opinion about it, potentially including : 1) the elements that should definitely be in the contract 2) the elements that should definite NOT be in the contract 3) dealing with extensions, delays, scope changes, and materials price increases. If there is anyone that can help a newbee in this field it would be greatly appreciated. Happy to share the content of the contract. Thanks!!