A new car is a big investment so spend some time on preparation. Not many people choose by picking the first car that drives past their house. Yet many people do just pick the first policy they find.
Choose the vehicle according to your needs and budget. Unless you absolutely love it there's no way you'd buy a car if you knew it was very expensive to maintain; and a small convertible is no good for family camping trips. Use the same approach for the insurance: check out the prices, look at what's included and excluded - if it's not in the policy then it's not agreed so it's excluded. Get general auto insurance quotes for each vehicle you're considering. Read the policies and use this as part of your vehicle selection process.
You can get quotes for general auto insurance online, by phone or through a broker. By doing it yourself you'll learn a lot and be sure that you understand exactly what you're buying. A lot of companies offer direct auto general insurance but some only offer it via a broker - this makes the sales process much easier for them.
Most people regard general auto insurance as an expense and a nuisance. Think of it as protection for you. If you don't have sufficient cover and something goes wrong you could end up owing thousands of dollars, or millions if someone gets badly injured.