So do you think I should upgrade before trying anything further?
Zwift can run on iOS devices and AppleTV which might be cheaper way to go. If you want to use a PC you would more than likely need to purchase a new one.
I use this PC and it works great: https://www.amazon.com/gp/product/B011D79KJA/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
A 4th Gen AppleTV would be cheaper.
What devices are you going to use with Zwift (trainer and such)?
I was planning to use my Samsung Galaxy S7 Edge with my pc buy I’ll have to rethink it.
I have a classic trainer with Garmin Speed and Cadence sensors