I wouldnt even as a last resort, do the maths, even if you had the hours to do the FO scheme you still only have a 25% chance of passing.
This would be even less of a chance as you still have to pass the TR well enough that they recommend you to start the testing which you have a 25% chance of passing
read this
FlyDubai Pilot Interview Profiles
You need to understand CTC are going to be involved, you have given them no money, the interviews they get paid to conduct so there is no incentive for them to pass everyone that turns up as that would reduce the amount of interview days they would need to conduct which they get paid to host.
Dont get me wrong Flydubai is not a bad company to work for, the issue is how much you are going to spend for a less than 1/4 chance to getting in.
If you went to a gambling house knowing you had a 1/4 chance of getting a little bit more than what you put in almost 5 years later would you really roll the dice.
Thats not a good pilot characteristic taking risks like that