i dont know the difference between modular and integrated training
Get yourself a nice comfy chair. Find yourself a large drink of whatever you like. Make sure you've gone to the toilet. Then start searching this site for info on the above.
On the subject of OAA and their entry requirement: Well, good for them. Have you found anyone else that has the same requirement?
The journey stories on this site make for excellent reading. Some will say they represent the exception rather than the rule. Fair enough. But they do demonstrate what is possible if you put your mind to it.
Regards, and good luck.
p.s. as mentioned here already, if you convince yourself you can't do something, then that conviction will almost certainly bear fruit. Balance your desire with a bit of realism, but don't write things off before they're begun.
JR