Build system for minecraft lookalike game

Hey guys,
I’m currently working on a game where you can build houses, bunkers etc. from lego bricks.
In this game you can also shoot and kill bots.
I wanna make a system so you can build (like minecraft) from bricks obstacles in the game.
I’m not very good in scripting, and i’m only 14 years old.
Can anybody give me a start on this, a little bit of coding?
I would really appreciate that!
Thanks!

here is a great 10-12 step tutorial to get you on your way. its a bit hard to follow but should get you moving in right direction

Tutorial: Minecraft in Unity #1 (Mesh Generation)