DEAR M.B.: Starting an IRA is as simple as walking down the street. My choice would be at a brokerage house, although you can do it any institution, such as a bank or credit union. The problem that one finds with a bank or credit union is lower returns than one might usually find at a brokerage house. It's a great way to save money for your retirement and, a few years down the road, you'll be glad you did.