How to create java web form with spring, bootsrap, javascript that calls java method?

this is my first question on stackoverflow and I'm really confused..

I'm new with java and very confused at this moment. I'm planning to create a java web service with spring that handles a webform and a portable scanner device. I get this project for my first in new workplace but I can't move on. I don't know what are the neccesery steps to succeed.

What I want from the Application running step-by-step:

1. Open in an executable file that

2. Open a new browser window on localhost and shows a form

3. Filling out form with input fields, checkbox items, dropdown list, commentbox,

4. AND Option for file upload from local and/or call startScan() java method.

startScan() = take photo from device and saves it to project's root folder and rename it as formatted date: "yymmdd_hhmmss"

5. submitButton()

6. onSubmitButton() the form data should be saved in database that later i can download as xml

I have read lot of blogs and watch tutorials but that causes me confused. JPA? Hibernate? REST? REACT? I would like to create a very simple app that can display the form on window browser that is easy to access with bootsrap.

What is the neccesery toolset for doing this as simple as possible? mysql? postgresql? which of these I can implement, what should i install locally?

If I could came out from back end to front that would be awesome..

Goal: Create a localhost database system that handles the form and scanner device method in a fancy css view.

Now, I'm using eclipse with spring. What are the neccesery dependencies? what are the local requirements for this kind of project? Please, help me with any advices..

I am very grateful for everything Thank you in advance