Does this look ok?

It looks okay, but I bet when it's actually lit up it'll be cuter. I found this article but IDK if it will be helpful! How to Stiffen Rope | eHow

I wonder if mod podge would work?

Thank you! I'll try the mod podge. But does it need lights? Right now its just rope and I plan on hanging just the rope on a greenery wall. Kind of going for this look but without the light.

Honestly it looks tacky and cheap to me. Have you tried using YouTube for inspiration?

Thank you all, I may just go with a generic neon sign from amazon, like 'better together' or 'love' as I'm running short on time and those are more affordable than a custom design.

You could get cardboard or wooden letters from a local craft store (or order them online), hot glue them together so it's all one piece, and then spray paint them. That might hold up better than rope and stay put better.