Oh boy...
You will need an external soundcard with XLR inputs. Do NOT use converters to 1/8 or 1/4 jacks.
Get some kind of preamp. Usually, there are ones with the soundcard, but no always.
Do you have something that can give off phantom power? You are going to need that as well
If an external soundcard is out of your reach finanically, just getting a small mixer with phantom power and preamps should do just fine. It will, for now, solve all three of those problems listed above, until you do some research into the plethora of options available to you and your computer...