Hi, Sorry for the ignorant question but if I plugged my mic into an audio interface and then audio interface into speakers would i get sound or would i have to use a computer as well??
If the speakers are powered, as in, you're using a set of powered monitors, sure. If they're not, no - you need an amp.
Well depending on the interface, you can't just plug a mic and speakers in and use it is a mini-PA system, if that's what you're asking. It needs the computer/software to route the signals.