This industry is all about timing and like kitenation points out, simply, now is just not the time. Keep the day job, keep your ratings current, try to get flying when possible and times will get better. I fear those committing to this scheme aren’t giving their sponsors the full picture and living on past laurels. The past is NOT representative of the future just now, no airline I know of is short of crew based on demand well beyond 2022.
The future is still very much undecided so the worst position to be in would be to take out a loan for this course and get little to no flying done this year, which is very likely. You will finish inexperienced and may lack confidence if sat around for months/years until something happens. You are not employed by Ryr during line training so they WILL fly their guys first to keep them current. You will likely have to renew your own TR and god only knows if Ryr will take you back a few years down the line.
Guys/Girls, just wait it out and if a recovery actually happens then by all means weigh up the risks, but for now this whole scheme is just a money spinner.