It depends. If the radio stations you want to hear are close enough, a simple indoor antenna might provide enough level. Usually an indoor antenna can be oriented so that it is directional, which might help if you have multipath issues.
If an indoor antenna doesn’t work, is there a chance you could install an outdoor antenna, but put it in the attic? That sometimes is a good compromise.
If an indoor antenna doesn’t work, is there a chance you could install an outdoor antenna, but put it in the attic? That sometimes is a good compromise.