What type of furnace do I need?

Hello, I’m in the process of buying a furnace and it just occurred to me that I might have been looking for the wrong one all this time. My home has those baseboards with covered pipes that stretch the length of one wall. Does it matter if the furnace I get is a forced air or a baseboard furnace? Will a forced air furnace work with a baseboard set-up? I know this should be obvious to me but it’s not.