Can you give me a little more detail on how exactly to do that?
First, take note of your operating system = OS. It should show when your computer boots up. Ultimately, you will need:
card
cable (probably attached to spkrs)
Spkrs
If its W2K or better, it will recognize any new cards physically installed (we haven’t gotten there yet) upon boot-up and find and install a driver.
Next, ask some of your friends if they have a dead computer they’d like to get rid of. You might get all your hardware (incl spkrs) right there. For basic audio, you can use cards out of a dead computer 10 years old. Any old POS will do. For some reason, I could not get on-board audio to work on my hp 2.4 GHz computer. I stole an audio card from a dead Dell that I picked out of the garbage. Plugged it in = worked.
If no friends have a dead computer (or if you have no friends) wander into a Salvation Army or equiv and at least get the speakers. Under $5. Try to make sure the spkrs have at least one knob on them (which means they are amplified) and that a wall-wart power supply is in the deal.
The other approach is to call a friend who knows someone who has a kid who knows about computers and assign the kid the ENTIRE TASK of finding the dead PC and spkrs and installing the audio card for $20. The kid will know someone with a dead PC and be able to pull the audio card out in mere minutes.
It may not be for you, but the entire task is really trivial for anyone who deals with computers. It would be easier to find such a person, perhaps from your church group or whatever, and pay them a few bucks to get this task done. Nobody should need to buy anything new to make this happen, and I would bet that 60% of people have a dead PC in their garage that the parts could come from.