took me 6 months to achieve what i have with photoshop, and im still learning and hopefully improving, i went through a period of noobishness for bout a year, then decided i wanted to get good, since then, i havent stoppped doing tutorials, making artwork, and exploring new things, so if you keep going you'll get there. I love what you have done with it, there is room for improvment as there is with everything, no matter who makes it. Good job!

P.S. no probs, only tip i can give is try to add more atmosphere, just having the brushing there is no use unless it looks 3d, and an atmosphere is built up, i learned that after making "crossed wires". You may notice from all my pieces from depletion on, there is a bit more atmosphere.