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As this is my first build any pictures or video of correct way to use shielded cables and where they are most beneficial. Thanks Frank

Most kits come with RG174 cable, which is very flexible but can be prone to shorting if you are not careful with the soldering iron, as too much heat on the braided shield can melt the insulation on the conductor wire.

Here's a link to a discussion on prepping shielded wire, with a great image on the steps you need to take:
https://el34world.com/Forum/index.php?topic=27186.msg298702#msg298702

Here is another page on general amp building....the section on how to prepare RG174 shielded wire is about 3/4 of the way down. Has good pictures. https://el34world.com/Hoffman/instructions.htm

Another option to the RG174 is RG316, which is also shielded coaxial cable but it has PTFE as the insulator on the conductor. This is nearly impossible to melt. The main drawback is that it isn't as flexible. I bought mine on Amazon. Its a little pricier than RG174.
Here's a good site which shows pictures of how the RG316 is prepped, and the input wires are connected. Scroll down about 3/4 of the way:
https://sluckeyamps.com/VAC15/ac15.htm

When using shielded wire, the key is to ground only one end of the shield. This prevents ground loops. For input wires, I ground the shield at the jack. This is how most layouts do it. The shield should be grounded at the same location the other grounds occur for that particular stage.

I always use shielded wire from the input jacks straight to grid stopper resistors located at the tube socket. If your layout has the input grid stopper resistors mounted on the board, you may want to consider relocating them to a terminal strip adjacent to the input tubes and run your input wires to that.

I also sometimes use shielded wire for the negative-feedback wire if I am getting noise. Similarly, if I have a post-phase inverter MV, I use shielded wire since those runs are usually over the board and prone to getting noisy.

Thanks Pharmrock-very helpful now if I can figure out where I went wrong with power transformer-keep blowing fuse.

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First, let's define what shielded cables are. Shielded cables are typically made of a combination of metal and plastic, and they contain a conducting material that helps reduce the amount of electromagnetic interference (EMI) that passes through them. This EMI can come from a variety of sources, including power lines, radio signals, and even other electronic devices. Shielded cables help to protect your electrical system from these sources of interference, ensuring that your electronic devices operate as intended.

Now that we know what shielded cables are, let's look at how they work. Essentially, the metal and plastic material of the cable act as a "shield" which reduces the amount of EMI that passes through. The conducting material inside the cable helps to dissipate the EMI, ensuring that it does not interfere with your system.

I'm looking into cable sheathing. Hope it all works out.