75562 Design and optimize image

This should be very simple for a designer who knows what he / she is doing. I need a cartoon style image to be designed and optimized for a web site. The image is attached. The caption at the bottom of the image will change. The image must also match the look of the web page. The winning bidder will be given "swiped image" of web page and the caption to go at the bottom of the image. NOTE: IMPORTANT THAT THE IMAGE DOES NOT SLOW DOWN THE LOADING SPEED OF WEB PAGE!