I succeeded in my first half marathon at around 2:25 and it took me two challenging years to break and make it to sub 1:40 finish. (1:37:25)
I'm sharing this not because I wanted to brag but to inspire people. If a guy like me who has no professional training in any sport can do it, I'm pretty sure you can.
Challenge yourself, and at least try. Learn from your mistakes, listen to people who are in the same field as yours. Find yourself an inspiration, and imagine yourself running with them (because, someday you will!) and lastly believe in yourself, the only person who is able to break that barrier is you. #whyirunmanila