Welcome to the boards :)
This somewhat answers your question:
The Verizon Lumia Icon can now download Windows 10 Mobile preview builds | Windows Central
Yes w10m is available for the Icon now. As for the issues; I'm not sure about those, however you could check it out on your own :)
Just make sure to download the windows devices recovery tool to your laptop/pc > connect your phone (just to be sure that it actually detects your phone).
Download the insider app to your phone and go with the release preview ring :) it has very few bugs and those builds are but a step away from being pushed to RTM.