(please be friendly, I am a kid and I am trying to understand how this works!)

Hi peoples out there! My name is Sofia, but I would like if you call me Musse! I am 12 years old kid(I made birthday on 17/05 :D) and I would love to create an amazing site, with colorfull background, and have my own blinkie, but I am a noob on this, so I wanted to improve my capacities in programming, so if there is anyone kind, I would greatly appreciate any tips and constructive criticism you could give me :> and for now, I gonna see tutorials :>(I am brazilian, so probably have gramatical errors here lol)