You can get a set of adapters. They are very inexpensive
Yes. I've installed a Project Fi data-only SIM in my Nexus 5. It works. You will need an adapter. This is the one that I bought: https://www.amazon.com/gp/product/B009GB6DBO/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1