Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Sound › Right mic for interviews › You may want to invest in
You may want to invest in a mic mixer so you can have two mics, on on you and one on your subject. 🙂
Here is an inexpensive one. (Azden CAM-3 Mixer)
You may also have another person stand off camera with a mic boom and hold it over both of you aiming it at whomever is speaking.