Question about domain name and ranking

im a noob so bear with me. I wanna purchase this domain name its more like a sentence that we use kinda like every day it gets 500k searches a month and competition is low and i want to build a site around that little sentence, a youtube link is #1 for it on the first page and the rest is a bunch of lyrics but none of this stuff is exact to what i typed in, just keywords, but how hard would it be to be to get on the first page

It shouldn't be very hard. Though unless you post more info about the competition there's not much we can tell you. Try posting a screenshot of the competition in traffic travis just remember to blur out the keyword.

Make sure to select exact match when using the keyword tool