Those nutes are fine. There are better ones but those will do just fine. The 55/45 sounds a little better that a 100% sativa. And that sounds about right being 90-150cm. The 150 is about 57 inches so I think you will be OK on height. This being you first grow you prolly won't get the best case scenario anyway.(no offense) Just keep us updated and I will help anyway I can.