Squarespace Expert for eCommerce Site Launch

Hi! I'm looking for a Squarespace expert to finish and launch my e-commerce website, sumbora.com. The site is built but not yet live — it's a private label fitness/lifestyle brand selling gym bags, fitness accessories, drinkware, and apparel.

What still needs to get done:

Finish the footer (expand to a 4-column layout)
Add a header search bar (I want the Will Myers search snippet — this requires the Business plan, which I have)
Install and configure the Squarespell wishlist plugin but need to relocate it on a better place.
Set up a payment connector so I can actually sell (Stripe/Square/PayPal — whatever integrates cleanest with Squarespace) and get checkout fully working end to end
General design polish — make product pages and the overall site feel clean and premium, not just functional
Website security setup before launch: confirm SSL, set up backups, review Squarespace security settings
Take the site out of draft/private mode and do a final QA pass (desktop + mobile) before it goes public

I'm working with a tight budget on this, so I'm looking for a fair, reasonable price, happy to discuss fixed price for the full scope. Please share your rate, an estimated timeline, and 2-3 examples

Thanks!