Where to start

I am looking at purchaing a home that is going to auction in early December. I need to move fast but at the same time I want to make sure I do this right the first time.

Note: I intend to pay cash for the home due to the lack of time to do traditional financing.

At this time I have made a verbal offer to the seller. I want to now proceed with a written contract.

Where do I start?

Do I contact a RE attorney, title company, or the sellers bank, etc to get everthing going?