do any hackers have a suggestions for a quick marketing website all we need is mailchimp to get subscribers ?

That question made no sense.

You can create landing pages directly on MailChimp https://mailchimp.com/features/landing-pages/

If I understand you correctly, you just need to knock up a landing page with a mailchimp form?
You shouldn't even need to bother with React for something that simple.
Just grab one of these: https://onepagelove.com/templates/landing-page-templates and drop a mailchimp embed code in!

https://www.producthunt.com/posts/ship-2-0 ?

EDIT: if you want customers "free", you need to write content.. In fact here are the most popular websites looking for content.

Here are places where you can promote. These can be considered as low hanging fruit and are a great place to start in your outreach efforts.

Indie Hackers —

LinkedIn Publishing Network —

Business2Community —

Business Insider —

BuzzFeed —

Entrepreneur.com —

Fast Company —

Forbes —

Harvard Business Review —

Huffington Post —

Inc. Magazine —

Mashable —

Moz —

New York Times —

SocialMediaToday —

TechCrunch —

ReadWrite —

SitePoint —

Social Media Examiner —

Jeff Bullas —

Also on popular Medium publications:

The Mission with almost 500,000 subscribers.

freeCodeCamp has almost 500,000 subscribers.

Hacker Noon has more than 300,000 subscribers.

The Startup with more than 300,000 subscribers.

Better Humans with more than 200,000 subscribers.

Think Growth with almost 200,000 subscribers.

UX Planet with 150,000 subscribers.

Muzli with more than 100,000 subscribers.

The Writing Cooperative with more than 100,000 subscribers.