A great place to check out is Roll20. This site is amazing and has so much information. You can play games online as if you were playing in person. The art of game play is never far from view, typically using voice through skype. I have been a DM on this site for going on 6 months and it is quite amazing. Thousands of campaigns running on this website all the time, you need to check it out for yourself.
If you joining up you should also look at getting a few starting packets out there for your own benefit to start your campaign.
Don't wait to check it out go now.