Alp,
Your concept drawing is an excellent example of what to strive for. But I would suggest you measure your body, arms, legs, etc, and then make a simple drawing of yourself and superimpose your body on your concept. I don't think you'll fit! Check this out.
After building my prototype out of wood, I found that I couldn't fit in the bike and had to lengthen it. Your concept and frame as shown seem to be plenty long, but my question is can you fit within the height as shown in the concept? I'm only trying to get you to think ahead, as I'm sure you'll get there.
Tom