Ah, so basiclly you are looking to make some fan comics? That's great!
You'll find that making comics is harder than it looks, and that creating story, dialogue, pacing, etc are super difficult for a first timer. Don't expect your work to be the quality of the comic you are basing it off of.
Some rules to follow in general:
Stay away from tracing and eyeballing the art from the comic.
Sure, you can eyeball and do master copies as RESEARCH for style, but do not put them in your comic or show them off to others. The same thing goes with the writing, make sure that you make the comic your own and don't borrow too much off of the original.
Post it online
Have a website for your comic and update it consistently. Ask for critiques, reviews and such. If you don't have the skill to create your own domain/website, you can use websites such as
SmackJeeves and
Drunk Duck are free to use and come with a pre-existing community.
RESEARCH RESEARCH RESEARCH
There's more to comics than meets the eye. Look up comics podcasts, forums, and tutorials. Read comics you wouldn't usually read, and read
ALL OF THE BOOKS BY SCOTT MCLOUD. Look up anatomy books, basic drawing books, books on perspective. Try tons of different methods and mediums (digital, traditional, pen, pencil, etc), and force yourself out of your comfort zone.