Shopify expert to help with Multivendor Marketplace App.

I am looking for a Shopify expert to help with an existing shopify website , which have installed a Multivendor Marketplace app which needs to be fully operating, The multivendor app is already installed and I just need general help to ensure all is working properly, and link the products to the collections and menu.

I need general help with the task above mentioned:

I need to be able to send the link to the sellers and they register all the products in the marketplace.(first need to be done)
Help me on Configuration the Marketplace - Store front Configuration - hon product description how is better to do the product description - Seller navigation - Help with custom filed? - Configurations of payments - Shipping configuration - Payments details - Delivery day - Shopify private app - Set sizes for images - Configure Metadata - google Recatcha
Sellers —— - Seller form settings - Shop page settings - Seller profile page settings - Customise page seller CCs - Customise welcome text - Favicon icon in seller pages - Create an example buying a product to see feedback - What to add in notification
Products - Create 1 seller profile with all the pictures updated, so we can see how it will look.
Orders — RMA configuration - Invoice configuration what’s the best? - Example of voice template and create a nice one -What’s draft order? - Automated seller invoice best option? -
Commissions- Set up commissions for sellers
Payment -What’s seller payment set up it and set up seller payment methods
Mail configuration - Set up a nice mail configuration and set up the template with me - Mail SMTP Setting what’s? - Mail counters - What’s mail log
Translation - product label translation - Set up payment label translations

I am looking which can be able to finish the project within 2-3 days.