Learn How to mod

Okay i am here today kuz ive seen all these badass mods .etc and i would sooo badly like to learn how to mod,and make designs for MPGH.. i have pursued this act b4 but with no succese i quit kuz i got mad ... so now i would like to relearn everything from the best modder here.. from things that i need to things that idont need.... jus please somone help..... things i need... Everything including photoshop..... i have been into photoshop for 4 years
Heres some of my work :

Okay i deleted it all :O sorry but if i get PS i will show yuh some of my amazing talents thanks for the time to read this hope YOU can help..........

Experiment.