Advice on lenses for beginners

[ameerat42]

Does anyone have model of a 400mm lens that would suit Nikon D90? Just standard not prime.

Do you mean "standard, not zoom"?

"Prime" is used to mean a non-zoom lens, ie one of fixed focal length.

"Standard" as in "standard lens" means a lens whose focal length is approximately
that of the diagonal of the sensor. In film days, a 35mm camera usually came with a
"standard" lens of anywhere between f=45mm and f=55mm.

And finally, I can't advise on such as you seek. Others surely can.