Experience with some growth specialist for SaaS?

Hi,
One of my Saas-products show nice MRR and growing numbers. But I think, there could be much optimized in terms of copy and in conversion from trial sign ups to paying customers.

I'd like to find an expert to help me with this. Many people on Upwork call themselves expert on this :) Is there any fellow Indiehacker having good experience with someone? Who would you recommend?