Your best bet is to have several agents come to your home, see it, and return with a price analysis. This will give you the opportunity to interview them and get the information you need. Once done, you will be prepared to move forward if/when you decide to do so.
And do interview agents, I can't tell you how many people walk into real estate offices and end up "assigned" to the agent who is answering the phones - we call it opportunity time and sit there for just that reason, but that agent may be experienced or not. You owe it to yourself to work with a great agent - if you do walk in to an office, by all means engage with that person, but only commit to including them among those you interview.
When I see an agent that has had their license for 2 months "get lucky" on the desk and list a home for sale -my head explodes... Great for the agent, but unfortunate for the seller.
Interview - consider 2-3 agents, and this pricing exercise is an excellent starting point to evaluate potential listing agents. If they struggle through this piece, run. And don't be lured by a price that doesn't pass the "sniff" test, ie, is too high. The practice of "buying business" is another thing that will slow you down and cost you money. You are looking for an agent that has the knowledge, analytic skills and frankly, courage, to give you a realistic assessment of your home's value.