What is the best resource to find out how much and what type of insurance I actually need to protect my new business and my person?

What I think I need: Simply put, I will need to make sure I am covered while I am in posession of a clients vehicle. I will only have 1 car at a time and will not house or keep a car in my posession. I will be driving the vehicle from home/office to repair facility and then back again. Sounds like a " garage policy " though I am not garaging anything...

What do I need to insure myself against? Vehicle accident jumps to mind... what else?

I am on the verge of launching my business and this is one of the first things I thought of but last items on my check list of " things to do "

Where do I go for these questions / answers?

As always - thank you for your input!

Steve