unless you want to train this guy for your NT, I'd sell him.
this is a rookie with very beautifull skills, and when he turns 19, and hasn't trained, he'll have lost his value. In fact, each week that you don't train him, he'll loose value.
So at this timepoint he's most valueble.
training his FT won't add much value, far less then he will loose each week.
For this player, nobody is gonig to give 1000 less because of his FT skill. If you could swap it with either of the other skills, it wouldn't make him worth more. In fact I don't even think you would get more from him if he had a few skills higher on FT.
So don't worry about that at all.
There's 2 good options: either sell him right away, he'll fetch you a lot of dollars, or fully train him right away, to either sell him later , or keep training him for your self and the NT.
They are not your friends; they dispise you. I am the only one you can count on. Trust me.