How to handle a project taht we have not yet experienced?

I am not sure if this is going to help you but let me put something down whatever is coming to my mind:

There is ALWAYS a first time. Nobody is born anything. We learn and aquire skills. In the process we fail, we suffer minor injuries. Injuries get healed. And we become "experieanced".

Be EXTREMELY compassionate with customer. The WORST kind of customer is ACTUALLY your BEST friend. The BEST customer is not going to very helpful.

Negative testing a software is a must. All we developer is just being TOO positive. We probably don't understand the true meaning of "Be positive" or apply it at a wrong place.

PERCEVERANCE is a must. Do not expect that things will go as planned. In fact they rarely do. So you should plan for failure too. (In this context i like this one - Fail to plan is to plan to fail. How nice!)

Enough said, I guess.