Did you miss the "Exploring LoRa with ARM Mbed" webinar? No worries. There's a recording of the webinar and many other resources to help you get started.
Start by watching the recording of the webinar here. It will provide with insights on what LoRa, how to use and why it is a part of Mbed: https://pages.arm.com/webinar-recording-exploring-lora-recording.html
The slides for the webinar are available separately here: https://www.slideshare.net/janjongboom/build-with-mbed-exploring-lora-using-mbed
After watching the webinar you can find the Q&A blog by Jan Jongboom here: https://os.mbed.com/blog/entry/QA-Webinar-Exploring-LoRa-with-Mbed/
Then there are a couple of helpful "How To" videos to guide you through the example implementation. the first one on how to configure the Multitech Conduit gateway device and the second on how to build the LoRa temperature sensor setup. Find the videos here: https://www.youtube.com/watch?v=u8jZ6zVMEQ0 and here: https://www.youtube.com/watch?v=vA5AtjZaM3Q.