I might consider this program, as a last resort, if it was on the A320 because it seems a more valuable type to have on the licence.
737 not so good, doing it might rule you out of Ryanair because they have no interest as far as I'm aware at the moment in people who are typed but no line hours, not many other operators who have 737 and consider no hours on type at the moment. If one is going to self sponsor type it is probably best to do A320...