I presume that it's not up and running yet?
As an FOC (71), I followed the instructions on the e mail to download it onto my phone. All went well, but, at the end, nothing would download. A piece of piss up to that stage. I'm not completely computer illiterate, but I had no problems. I mainly use my phone for, surprisingly, making /receiving phone calls, texts, WhatsApp, etc, and very occasionally use t'internet. In the past, I've printed out things like flight tickets, etc. If this works, I shall move into the 18th century.
If I can do it, with my limited knowledge, most people should have no problem. The instructions made it easy.
(I will also carry on my tradition of getting to the ground just after the gates open - just in case!)