Hi there,
I'll keep it short, no filler and fluff. I have 14+ years of programming and I'm 101% positive I can help you with your task as I've seen what you want and already tested it on your website to see what it's all about.
I'm so confident because I would not risk a new profile with something I can partially do. In fact, just to test my programming knowledge, you can throw any kind of problem at me right now (not necessarily related to your project) and I'll solve it for you.
Regarding your task, here are a few suggestions: After users clicks the submit button, while the script is sending you the data, we can add a loading icon on the button and after the script is finished we will disable the button or remove it entirely.
When you're available, please ping me with more details so that we can get this done ASAP.
Looking forward to helping your reach your goals and build a great business relationship.
Regards,
Kalin