Hire to integrate LimeLM + FastSpring + Sparkle into ASObjC app

With a fair amount of help I’ve managed to write an ASObjC app in Xcode (mostly AppleScript - what I know - to be honest) and have hit the wall of my capabilities when it comes to getting the thing ready to sell outside of the Apple Store. I would like to talk to someone about hiring them to help me integrate LimeLM (licensing keys), FastSpring (online store) and Sparkle (for updates). I don’t know how this would work (live online Zoom meetings to talk me through doing it myself or sending you a basic Xcode project and having you add these integrations by yourself?) but can anyone recommend a good person (or business/service) to assist me? Thank you.