What can I do to effectively become good at piano?

I am a beginner. I take piano class at my school and we are going through Alfred's book, the adult piano lesson. In addition, I had a piano teacher that started me up with Clementi and Burgmuller as well as Czerny. I do somewhat well with these pieces, but yea I still lack the ability to sightread, and just simply look at a piece and to play it. I know what the lines and spaces are, but I just can't seem to play without stopping and using those pesky acronyms used to spell out the lines and spaces. I have a keyboard that lacks motivation to be played because it is not weighted, and it's a Casio, not even a full set of keys. Which keyboards would you all recommend, or upright piano? Something worthwhile and durable for a nice medium sized one story house. It have plenty of room, for an upright. I stray away from learning by ear, and I just want to focus on sheet music. What is your input? Once I listen to others play who play well, that serves as my motivation! Thanks!