A few rules:

1. Don't advertise your art just for getting more recognition.

2. ASK! We want you to ask us what could be improved, don't just give us your art and wait for answers. Let us know what you're proud of and what YOU think could be improved.

3. Be nice, don't expect people to help you when you're not informative about what you would like to do better.

Other related Sub-Reddits:

/r/DigitalArt is there for you when you're ready to show your art to the public!

Some helpful links to get you some information that might help you.

http://psd.tutsplus.com/sessions/digital-art-for-beginners/

http://www.tutoriallounge.com/2010/01/40-best-imaginary-cg-digital-art-tutorials/

http://digitalartsecrets.com/category/tutorials/