Purchasing and Shipping platform/portal database on sharepoint

Currently, our company utilizes Sharepoint heavily at a central location. Purchase requests are filled out on an excel in PDF and emailed directly to a purchasing inbox. I want someone to utilize MS form or something of that nature, SharePoint, and flow to set up a purchasing and shipping portal. Employees will go to the Supply Chain SharePoint page and fill out the form for a purchase request. At that time, one of the purchasing agents can take the request/and assign it to themselves. From there, they will have different queues to put the request (reviewing, In approvals, approved, ordered, Received). If the request needs to go to the approval queue, the purchasing agent will assign the correct email(s)/user(s) for an approval workflow. Every purchase request would have an automated number assigned to it, and each request would need to be stored in a sharepoint folder for audit purposes. Additionally, I would need to run reports for finance to show all the purchase requests and spending for each cost center.

I would also need the same concept made for shipping requests. This could all be on the same SharePoint default page.

I would love to chat for a few minutes to expand more on this project.