Poplar maybe. Most woods can be burned it's just that some don't put out much heat. Generally heavy dense woods produce more heat and very light woods don't. Some of the conifer species are quite pitchy and can cause creosote problems in the chimney that can both plug it up and possibly cause chimney fires but that isn't a conifer so you are okay there. Some woods take up to two years to dry properly. They dry faster when split. Where I live wood is most people's primary source of heat as there are no gas lines in the area and oil, propane, and electricity are very expensive to heat with.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.