First of all, since you are new to this, I honestly doubt that the keyword you consider low competition is actually low competition.
Second, Fiverr is shit. Yes, there are a few good services there, but you are new to this and you won't be able to recognize them from the rest.
Third, do some more reading on SEO, because if you expect to register a domain, throw a service for $5 at it and expect to rank #1, then no, this will never ever happen. So save yourself some money and do more reading.
Fourth, learn patience.