Problem 1: it seems to me you are asking three questions:
a) is the website copy good?
b) how is your UI for trial users?
c) how do you acquire users?
I suspect c) is really the problem you are facing.
a) yes, but like all website copy there is room for improvement
b) this is irrelevant if your target audience is not yet finding your site and being convinced to click on the “Get early access” button
c) By coincidence, I recently wrote a long article about this: How to get your first 10 paying customers.
Problem 2: Someone from your target audience arrives at your landing page. They ask themselves within the first second, “Am I in the right place? Is this product for me?”. And you don’t answer that question until below the fold. You need to state clearly above the fold these words in some combination, in an order that makes sense: “SaaS subscription affiliate referral management.”
“Pricing”: add a link to pricing to the top of your website. People generally want to know very quickly if this is something suitable for them, and pricing is one strong clue. A $49/month cheapest plan tells small companies that, yes, this is for them. When pricing is hidden, many people assume it could be enterprise level “Ask Us!” pricing.
“Easiest setup ever”: get rid of this entire section. “easiest” and “simple” are words that don’t sell. No-one is deciding not to sign up because they’re thinking it will be too hard to set up.
Problem 3: "I hate writing articles"
So don’t run a blog. But you do need some pages on your site aimed for keywords such as: “SaaS affiliate program” and “how do I add an affiliate program to my SaaS?” and “affiliate tool that works with Stripe subscriptions”. Write them (or outsource the writing) and SEO the heck out of those pages.
An SEO success story: A friend of mine had a site that was in the TOP 2 Hacker News spots for several hours. It dominated several subreddits, and was shared and shared and shared. After the initial spike, his site traffic went permanently up to a level much higher than before the Hacker News madness. It did nothing for sales. Then he taught himself some basic SEO skills. And sales started almost immediately.
(BTW: You don’t seem to have Google Analytics (GA) on your site. If not, you should really get install GA and also Google Search Console. Unless you are using an alternative.)