Lots of Random Wholesaling Questions From a Newbie

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Hello BiggerPocketeers!

I am preparing to start marketing for wholesale deals as a side hustle and have run into a few questions that I need to be answered before really getting going. 

Context: 

• I have my real estate license, which is listed under my mother's broker's license 
• I live in Northern California (Sacramento area) 
• My plan was to build or buy a list of absentee/pre-foreclosure/tax delinquent homeowners, skip trace them, then cold call to get deals through the pipeline.

Questions :

1. Since I have my license, should I consider double closing? Or would that just be a waste of time and money?
2. Is the person I am assigning the contract to the one who pays for the title fees, and all fees for that matter?
3. Does anyone have a simple phone script for cold calling outbound to people on my list? I have a good idea: "Hello, my name is Nolan, I was calling because I am a local investor and lisenced real estate agent, and I noticed your home was (absentee/pre-for/taxes). So I wanted to see if you would be interested in (this is where I get stuck on my wording) scheduling a time for me to come by the property to make an offer to buy it?"
4. How do California wholesalers usually structure the contract (EMD? timeframe? option)?
5. What else am I missing that any newbie MUST know? (this is more to avoid any risks rather than how to find deals)

-Nolan