you dont need "a built". Just choose the weapon you wanna play with. Get the right Armor for it ("light" if magicka based, "medium" if stamina based, even "heavy" if you wanna play a "tanky" style).
- Make sure to slot at least 1 Nightblade skill from each line on your bars.
- Dont be afraid to wear like 1 armor type you dont wanna really play with. It will level up all armor skill lines and you are free to play another style later on, if you decide to do so.
- When "maxing" some skills just get other ones from the same line on you bars. Try to level up as many skills as possible while getting exp from kills, quest, chests and so on.

If you need more help just say where your problems are and what "built" you are running at the moment. While leveling from 1-50 (and further on) skills will change a lot, just because you wouldnt get any more exp on other ones. Finding a good combination ist key most of the time. Not because the game is too hard, just because its fun to be effective and switching your playstyle a bit.