My understanding is you have a VM with OpenEDX, but you are not able to access to the web interface from your native host, right? Have you checked this documentation?
By default, our VMs don't use port 8080. They use port 80.
To check your VM IP, you should access to your VM console and execute:
ifconfig | grep "inet "
You should see something like this:
inet: addr: 192.168.200.151 Bcast: 192.168.200.255 Mask: 255.255.255.0
Then, you should try to access by using the IP after
I hope it helps