Hello,
I can make a beautiful landing page for you, with a neat form on it. I will be needing some thoughts regarding the design and possibly the niche of your site.
Also, I can implement a Captcha (Google Recaptcha v2). I suppose the form entries would be sent to your email?
I'm very cheap since I need to build a portfolio on here.
If you're interested, shoot me a message.
Have a nice day!