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!