If you realize what tough job it is to have a dog, and that it costs money, then yea, a dog is great!

I suggest that instead of getting your own dog, volunteer to take care of someone else's dog as they go on a short vacation or something. Then things will be much more hands on and you will have all the instructions from the owner to fall back on if you're insecure.

If after that you feel that a dog is right for you, maybe then it is.