I think you will do well to have 1 or 2 sales the first couple of months. It takes time to work into marketing. I started in 2006 for a few months and had only 2 or 3 sales before I had to drop out for awhile.
I started over in Jan this year and have worked very hard at it. I have had 1 affiliate sale, several Free sign-ups to programs, some adsense money, and am mostly working on getting traffic.
That is the number one priority for newbies as you cannot have sales without traffic.
Make sure you have good programs that are honest and appealing to people in general, and then do all you can to drive traffic to them.
I will say it will take 5 or 6 months before you see any real progress in sales online. That is my general concept. Someone else may have more to add.
It does require patience....
Sierra