How do I achieve pixel perfect effect and what do I need to have in mind if I go the Pixel Perfect route?

I know this has been asked before, and please understand that I have read as many Unity Answer questions as I have been able to find. Not to mention numerous tutorials and blogs that discuss Pixel Perfect orthographic cameras. I feel like I'm close but I'm still having issues with getting everything working correctly and there seems to be a few different strategies to achieving this and I think this is confusing me. Honestly, this does not seem all that complicated but something is still confusing me.

Here's what I know:

1. First I should have a resolution in mind, let's say 1024 x 768

2. I should also have an idea about the size of my sprites, how about 64 x 64

3. I create an orthographic camera in the Unity Editor and set the size to 6 because I want to be able to display 12 sprites vertically. (12 units will be equal to the vertical measurement of my camera)

4. I've set my resolution by clicking Edit > Project Settings > Player and my settings look like this:

     Default Screen Width: 1024
        Default Screen Height: 768
        Supported Resolutions: All of them are checked.
   
   

5. I create a mesh in blender that is 1 x 1 unit wide according to blender's default scale (I've read that Blender and Unity both use 1 meter as the default unit)

6. I import the mesh and set the scale to 1 because by default Unity imports .3ds at 0.1

7. The first texture I create will be the ground(It's a 2D top-down perspective game). I create the texture with the measurements of the resolution because I want this to cover the entire screen.

---Questions--- 1. I know that my 1 x 1 mesh will not work for the background texture because that the mesh will hold only 64 x 64 pixels, what size mesh would I create to hold the background image and how is this calculated?

1. Are the above steps correct, is my understanding of what I need to do complete or am I missing something? If so can you please point out what is missing and where I can go to broaden my understanding?

2. It's clear to me how to work with the vertical size but the horizontal size is a mystery to me. I've seen someone write that it's based on the aspect ratio. How do I ensure that the game will be correct no matter what resolution display? I feel like it needs a script of some sort to adjust the horizontal measurements based on the current resolution, I know C# but I'm not sure what I need to adjust to accomplish this.

3. If my understanding of the setting of the orthographic camera size is not correct, can you please explain where I am wrong and the correct procedure?

Thank you to anyone who takes the time to read and/or answer my question. I've made a decent number of games from scratch in pygame and even a game in Unity (A 2D shooter at that!) but pygame is 2D by design and because I didn't release the 2D shooter I didn't even mess with the resolution/orthographic size at all since it was only played on my personal monitor. This pixel perfect effect is really tricky for some reason because it really seems simple yet when I load up my background texture, make a material out of it, and attach it to the mesh renderer component it is never the size I need it to be.