Agree with the above, talk to a lawyer, get only what you need. You can also reach out to insurance cos and get their perspectives. Depending on your business, there are typical policies, amounts, deductibles, etc. I am in the process of getting insurance for my company (professional services: mgmt & tech consulting) because a contract required specific types and minimums. The insurance broker said what was requested was pretty typical. (Gen liability, auto liability errors & omissions) and was in line for state minimums (I'm in VA). It took about an hour to go through the various questions and description of my business, and it appeared to be specific to a category (they categorized me as IT Products and services, even tho I have no immediate plans for a product). If I was a building contractor I'm sure there would be different q's, or if I was making a widgit, etc...
I think for me it will cost about $600/ year for $1M gen liability, $1M Auto liability, $1m property, and $1m e&o. Each of those is per incident.