Overwhelmed- Need to do Clean Windows 10 install ?

The current plan is in process. Write down everything that I can remember I need. Used and created Drivers Backup, multiple thanks. Firefox tool no luck. I have been saving the Thunderbird directory in the appdata roaming, IIRC can't I just replace the new installs directory with the latest one I saved? Downloading Windows Creation Media to USB to boot and run from there, any caveats?? Have UEFI and don't know what UEFI-GPT means... Sorry again. I don't want to retain any partitions of any of the original HP stuff. IIRC the WMC tool will completely reformat the SSD, is my recollection, faulty. Getting closer to the attempt. Feeling more positive because of the forum's members help and advice. Inherently pessimistic though. I have a DIGITAL License is that a problem????/
Thanks

I am planning on a clean install. Nothing but Windows 10 Pro. Downloaded Media Creation Tool today to a USB. Concerned about the digital license. In a tutorial there was mention of disabling the Secure Boot and the Fast Boot in the UEFI (BIOS?). Certainly unsure of this, is it necessary with a clean install. And the term UEFI-GPT was mentioned and this is on the list of things I don't understand. Appreciate your response.
Currently I am using trial Macrium Reflect and have backed up with it. There is a discount for purchasing the software prior to expiration and I am concerned that with clean install, if I will loose the opportunity. I still have the installation and the user account info.

Good. Another possibly inane question, I have an Optane Drive along with the SSD(installed). I have a separate USB Drive for data storage. Any obvious (to the knowledgeable) forseeable problems with this configuration?

I've never changed BIOS settings to install Windows. I've never disconnected extra drives to install Windows. I've never had any problems installing Windows. I've also only used an installation USB flash drive created with Microsoft's Media Creation Tool or manually using an ISO downloaded from Microsoft. I've never messed things up with Rufus.

I think you are overthinking it. I would do what was mentioned earlier, run a dual boot system for a bit to transition over your files.

I re-install windows at least 2 to 3 times a year as systems can get bogged down. I only install the O/S and programs on the c: drive everything else goes on separate drives ( I have 8 at the moment ), this makes the reinstall process very easy and quick. The whole thing is done and dusted in less than an hour.

I have never had to disconnect the drives....there was an issue I had back in the XP days with the installation with other drives connected, but, reinstalls have been absolutely fine over the years with drives connected, win7 and win10 have always reinstalled without any issues.

Well I am back online and continuing the install. Thanks to all. Optane was originally setup IIRC as a cache or something. Currently it is an unassigned drive. On the list of things to think about! Using Macrium. Continuously backing up as I get more stuff figured out and configured to my liking. Have numerous questions which I will ask when I get to a settled point from getting rid of Teams Icon to Windows Defender telling me to let it decide what I can run or not. So far I didn't use any of the drivers that I backed up, I guess that is another question.
Forgot or whatever I didn't stop the fast or secure boot in the UEFI before installing. Sure have a lot of disk space!!!!!
thanks for the Optane drive info, officially on the list