It wouldn't be that hard to do for someone familiar with AutoCAD or similar. Somewhat tricky to locate the pivot points and lengths. Easiest to locate the sitbones on a current bike and measure from there. The location of joints and their movement is a little complicated, but shouldn't be too hard to get good approximations. Need a good assistant who's somewhat familiar with these issues to do the measuring. Then it's just a matter of cadding it out. Should be able to do it in a couple of hours after getting the measurements. Do one with lower body, pedals aligned with seat tube to get saddle height, save and copy, modify for saddle set-back, save and copy, add torso and arms, get stem length.

The bigger question is "what's it supposed to look like?" That varies with the person, their experience, their training state, and what they're used to, if anything. That's why people go to a good bike fitter. That process is quicker than CAD and, if the fitter is any good (an important question), gives reliable results.

Rather than try to solve these sorts of problems oneself, the simple way is to go to a person who knows more about it than you do. We can't see and touch you, big disadvantage.