Two questions to ask yourself before you start.
Do I want to start with a fresh install or clone my hard drive to new?
This is important because the both has different steps. Fresh install is the easiest because you create the boot drive and install windows after installing new drive but with the clone, you need a way to clone the old to new and will require more tools for this type of job.
I can guide you using the fresh install. You will need T5 screw driver and Philips and the new SSD. The SSD that it uses is NVMe M.2 SSD . You can get these on Amazon, eBay, newegg, etc. I recommend the Samsung Evo drives.
I actually found a video that can help you get in the machine, the user also posted a link on how to make the windows boot drive. https://answers.microsoft.com/en-us/windows/forum/windows_10-windows_install/clean-install-of-windows-10-os-on-new-ssd-best/9186ae98-b2b4-4b7a-b3ff-0b053ce2d1c9
Video: https://www.youtube.com/watch?v=R5dLLkawCjg
If you want to do the clone method then let me know and I can guide you with that one also.