SharePoint Site Customization Assistance ASAP

My team has already built roughly half of a SharePoint environment, but we are at a stand-still finishing the site customization pieces and tightening up document versioning. I need a SharePoint specialist who can jump in immediately, review the existing architecture, then complete the remaining branding tweaks, page layouts, web parts, and navigation polishing so the site feels cohesive to end users. Alongside those UI changes, I also want you to audit and refine the document versioning settings we have in place to be sure our libraries retain the correct history without ballooning storage. If you spot quick wins around content types or metadata while doing that, I’m open to your recommendations. I can provide full access to the current tenant, design assets, and a short walkthrough of what’s been finished. The goal is to have a production-ready site as soon as possible, so I’m looking for someone who is comfortable moving fast while still documenting any key configuration changes for future maintenance.