Welcome to ELL.
Two valuable inputs so learners like you and me take care of that next time.
Firstly, if you are using according to, it should be in second and third person. In first person, use in my opinion.
Secondly, capital letters sound rough and it seems that the person is shouting.
Now the quote...
It took me 17 years and 114 days to become an overnight success - seems incorrect.
Something happening overnight means it took just a night to get happened. In other words, it happens when someone sees the next sunrise! But here, it took quite a long period and undoubtedly the success has come after a lot of hard work. Overnight success is not something that fits here I guess.
But yes, you nailed it right. You become successful and not success.
So, revising the sentence...
It took me 17 years and 114 days to become a successful person.
Good read about the sentence construction is here.