For publishers, check The Writer's Market, still the go-to resource for traditional publishing. Make note of those publishers that do not accept manuscripts submitted by anyone but a literary agent. You may wish to submit to agents first, just to avoid that faux pas. Follow submission guidelines to the letter. No publisher (or agent) will want you if you can't follow instructions.
Should your bait hook an agent or publisher and if you're offered a contract, indulge in that congratulatory glass of champagne and then consult an attorney to ensure that the terms are fair. There's usually a bit of negotiating room.