A business requires insurance. At the minimum, you need liability insurance. There are other types of insurance though. I've got liability insurance, workers comp insurance, key man life insurance, and for years we had vehicle insurance on our van. Insurance is one of those things new store owners don't always think about.
My second year in business I went to a seminar where a store owner had someone drive through their front window into their store. Twice. He was the likely guy to give a presentation on business insurance and for many, needing such a thing was an eye opener. When I started I had a home and assets and made sure the store was incorporated and insured and far away from my personal life. For most young people without a pot to relieve themselves, that might not be a consideration.
So how do you get insurance? Find a human. I'm not sure if you can get business liability insurance online, but if so, it's a bad idea. You want to talk to a human about your particular business needs and exactly what you do and where you do it. For example, my store went from a regular retail environment to an improved, two story monstrosity in need of rebuilding if it burned down. It probably wouldn't be rebuilt there, but they'll pay to rebuild it somewhere. If I had just gotten regular liability insurance, I would be left with no protection and a ton of outstanding loans for a burnt out shell.
Other considerations include insuring Magic singles. My policy has a "fine art" clause that includes those. What you don't want are surprises. Insurance companies are all about taking as much money from you as they can and paying out as little as possible. It's better to be up front, find angles to cover everything necessary, and avoid surprises. Look at your lease and see what you're responsible for. Plate glass insurance is often inexpensive, but if someone breaks all your windows, you could be out thousands of dollars. Over time, revisit your policy and up your limits when you add inventory or fixtures.
Who is that human? I have a customer who jumps from job to job, and one of his latest was insurance agent. He was an agent for about four months before he moved on. Do not use a green agent. Find someone experienced. I had a new agent misclassify my company for my workers comp policy, thinking I didn't need to be covered as an owner, when in fact it was necessary. A company audit revealed the mistake, and rather than admitting their agent error, they charged me $3,500 in back premiums. Insurance companies exist to do two things: take as much money as possible while denying your claims.
Personal insurance agents tend not to handle commercial insurance, so you probably won't be able to use your Aunt Kathy's agency to handle your commercial needs (my Aunt K does my personal insurance). Attempt to find a well regarded commercial agent who has been doing this for a while and lay all your cards on the table.
Classification is tricky as there is no "game store" category for liability insurance. You might be classified as a toy store, a book store, a hobby store, whatever is close, and the cost between agencies and within each agency could be enormous. As long as you don't get cute, something reasonable should be fine.
Avoid buying a policy based entirely on price. Ask what's not covered in your case. Have a good heart to heart with the agent. These policies are really cheap compared to what could happen. I once transitioned between agencies and in a 30 day overlap period, someone broke into my store, doing a lot of damage and stealing a lot of cash (foolish me). I talked to my new agent who walked me through my old coverage, which sucked, and my new coverage, which was great. I filed a claim with the better coverage, and yeah, they canceled me exactly a year later, but I saved $900.
Make sure you have extensive business interruption insurance, which is usually standard. Knowing that my store could burn down and I have months to find a new place while paying employees allows me to sleep at night. When you get bigger, losing all your employees can destroy your business as easily as fire.
What's a Good Company? I don't know! They're all terrible! I can't even remember who I have now. Let me check: Travelers for liability, State Farm for key man life insurance, and AP Intego for workers compensation insurance (pay as you go). Farmers burned me on that workers comp policy I mentioned, so maybe avoid them.