calm down. you're still young
don't ruin your reputation
by young, i mean as in age (12), your first hacking community, and your first few GFX works + your a new member
don't flame back, just ignore it.
For starters, I suggest you experiment with Sumo Paint (basically an online version of Photoshop that lacks many MANY photoshop features, but the 'engine' runs similar to Photoshop and you don't need to download anything.
Then from there, improvise for a few hours for 1 week, and then if you start to get good at it, get Photoshop and start reading tutorials + getting used to Photoshops UI (User interface / controls)