Hello, sir.
Thank you for your OpenGL project.
I read and understood your proposal enough.
I am very interested in OpenGL.
I have done many OpenGL tasks before.
It is easy to learn and handle since OpenGL is state machine.
If you want I can deliver you my small sample.
Looking forward to hearing you soon.
Thank you for considering my proposal.
Best regards.
PS: I can show you my OpenGL ability!
PPS: As you can see I am a new freelancer. So I think credit is more and more important than earned money.