Here are the tutorials I followed and the work I produced.
Learned Tips:
Top right Drop-Down Menu --> UV Editing layout
Make sure Unfold3D plugin is turned on
In the UV Editor panel, the top menu 'Textures' has a built in Checkers option
The little Checkerboard Icon below it and to the left does the same thing
Object Symmetry is in the UV Toolkit to the right, has a drop down menu for the axis
Work Flow:
Select the Object you want to Unwrap while in Object Mode
In the UV Toolkit open the Create Drop-down menu
Click Planar [Shift-Click to adjust its settings settings]
Open the Cut and Sew Drop-down menu
At the top of the window, open the UV Drop-down menu, and turn on 3D Cut and Sew UV Tool [This allows you to click-and-drag on edges to make cuts]
After making cuts, while in the Select Tool, right-click and hold to select UV Shell
Using the Move Selection Tool you can move the 'shell' pieces around in the UV Editor window [make sure to turn off symmetry if you want to grab one piece at a time]
In the UV Toolkit window, open the Align and Snap drop-down menu. Here you can move shell pieces that you have selected by clicking on the 3x3 grid [this is OPTIONAL]
Also in the UV Toolkit bar, open the Unfold drop-down menu. With the selection tool, select shell pieces and click Unfold. [You can shit-click 'Unfold' to access its settings. A good practice is to have 'Pack' toggled on.]
On Unfolded shell pieces, you can right-click > Tools > Grab to actually move the vertices of the shell around manually. [You should toggle the UV Distortion on so you can see if you are making things worse or better. Red = bad, White = good]
If two or more shells are going to be similarly textured, you can use the Flip tool inside the UV Toolkit > Transform > Scale > Flip [make sure to choose an axis]. Then, you go to Arrange and Layout > Stack Shells, apply this by clicking selecting both and then clicking Stack Shells.
If some of the vertices aren't perfectly aligned on top of each other, select the vertices you want to align, then go to Align and Snap > Match UVs [shift-click to adjust how far apart the vertices can be before adjusting]
If the resolution (Texel Density) of a shell isn't the same as the rest, select a shell that has the appropriate Texel Density, go to the UV Toolkit in the sidebar under Transform > Texel Density > then click on 'Get'. Next select the shell you wish to make changes to, and click on 'Set', which is right next to 'Get'.
When you are finished, and you want to clean up and pack your UVs together, select all the shells and then go to the UV Toolkit > Arrange and Layout > click on 'Layout'. [Shift-Click to change how it automatically packs your islands]
TO SAVE YOUR UVs [export them] click on the camera icon at the top of the UV Editor window.
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