Where can I draw a picture like this?

When you post your schematic, a hand drawn circuit in jpg or png is far preferable over a pretty Fritzing picture. A schematic is way simpler and easy to understand than a physical layout. The schematic is a functional description describing the flow of operation. The symbols actually describe functions and are read as such, something Fritzing does poorly. Using Fritzing will reduce the pool of folks prepared to even look at your problem. Do not hurry drawing a schematic, it is a very valuable tool to help you and us understand your project. On paper, just draw a box for each component, label the pins used and draw the connections.

Personally, I like Autodesk Eagle. It's free for small boards, and I've never run into the limits. The hardest part of using Eagle is finding the parts in the huge collection of libraries.