Don't give up, you've already started. And you have nothing to lose, you can - strictly speaking - only win.

I don't know anything about sequin embroidery and that's why I read your article in the hope of learning how to do it... At least You motivated me to try something new.

I think it's a good idea to give the iris a color (I like the shade you chose - or turquoise^^).

Don't let it get you down... You learn from mistakes and practice makes perfect ;)
I'm very interested in the final result =)