There are multiple replies on that in this thread. Most of the ones selected are indeed below 30, but it's not limited to that. There aren't a lot of them, but there are cadets of 30+. Just not as much as some of the ones that are waiting are hoping for.
The references can be typed and do not need to be handwritten. CRC is sufficient for the country that you live in. You only apply for an airline ID once you have been assigned a 'permanent' base after Linetraining. The only ID you apply for is the RYR ID. You will need to provide (email) addresses or phone numbers from your previous employers that still exist; They will be contacted by the company that screens the applicants and are requested to fill out a couple of forms and return these to the company.