Making Changes (at code level) in Wordpress Website

We have an Ecommerce website on Wordpress (Using the plugin WooCommerce, WP Multi Vendor and some other supportive pluggins) We are now converting this e-commerce website to a discovery platform so we require changes on web pages, user & vendor dashboard, and that has to be done at code level (Changing the code at plugin level). Please find the changes required on the website. ----------------------------------------------------- Panel for Vendor to Register : (wcmp is the multivendor plugin we are using) We need to increase some fields and also improve the page design (The wcmp plugin does not allow us to change the design part, so have to be done at code level). -Name -Company Name -Mobile -Email Verify your email Id !! (Verification of email id have to be done) ———Next——> Vendor DASHBOARD (we need a very simple looking dashboard) Currently after login it takes us to the wordpress dashboard which is very confusing (for not so technical people). ----> Upload your products (Some options are present already in wordpress & some have to be added completely afresh: (Minimum 10 Products) -Product Images -Product Name -Product Description -SKU -Category -Supply ability -Shipping (India Only) (International) -[Checkbox] Available for bulk orders only!! -Price (per piece) -Price (for 10/100 piece) - Only for bulk order ————————— Artist/Vendor shop page We need to change the look and feel of this page as well... Example: [login to view URL] …………………………………………… Product Page: Product page is of wordpress (woocommerce) Example product page features: [login to view URL] -Options to display "Available for bulk orders only" products!! -Price (per piece) -Price (for 10 piece) - Only for bulk order -Product Prices not to be displayed for all (Only registered users) Contact Seller : Only if the costumer enters Name, email and mobile. Once the details are given prices to be shown + Customer gets a form to contact seller + Seller gets a mail with customer info and the product form. Seller dashboard gets a notification with all updates of his shop and products.. Like the number of views, no. of inquiries, pending queries and others.. We need to keep the website all screen optimized as it is now or better.