I don't have a mic on my computer, and I would like to be able to use my handheld if possible. If nothing else, then to become more familiar with it.The net operates on Echolink, which can just be set up on a computer with sound and a microphone, or alternatively on a smartphone or tablet. So you don't even need your handheld.
You need to register.
echolink.org or secure.echolink.org
Another method is to connect to White Mountain Repeater Association (Starlink) repeaters which are all over the US
I believe you can also get into the system using a hotspot (I'm not really up to speed with that)