IT Asset with Approval App

Hello, i am building an IT Asset request App, that will also need an approval workflow.
I am still in a brainstorming phase, but the following come to mind.

• First, what should i use? Lists? Dataverse ? Tables ? Entities? or otherss, kindly advice?

• Second, how do i define Users(Employees) who can request an computer and how do i automatically detect their reporting manager ( who will be approving or not).

The flow is as follows

• Two kind of roles can request a laptop

1- Someone from the HR, who requests a new laptop for a new employee

• This Dose not need an Approval, it only needs to notify me ( who will purchase the laptop) and his/her Reporting manager ( And record it in the List with a pending status)

2- An exisintg employee who wants a new Laptop, and requests it through the app, which will notify me and the HR system , appear in the application as awaiting approval (from his/her) reporting manager, once approved, i will be notified to go purchase.

The list or database will also be used for record keeping and seeting status of laptops, who is using them, when they were purchased , etc...

Below is a Flow ,Table example and App example

Here is the flow

Example Table