Reinstalling Windows would be the PREFERRED method, if you want it to be right, and not have any issues afterwards.
If you are looking for the Windows 11 Clean install tutorial, you can find that here: Windows 11 Clean install tutorial (Click here) Otherwise, welcome to the Windows 10 Clean install tutorial This tutorial is intended to help you, step by step, to perform a clean install of Windows...
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But, if you MUST clone the installation, you can do so using USAFRet's method seen here:
I tried to install SSD. I cloned c drive using micrium reflect software. I didn't clone other drives. But now I am unable to boot from SSD. Do I need to clone all partition to boot from SSD.
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However, cloning is probably not an option going from a 1TB drive to a 128GB SSD unless you get rid of pretty much everything on the drive by uninstalling it until you are down to only the OS, and if you do that, you might just as well do a clean install.
I agree as well that 128GB is probably too small these days, even with a clean install, even with another drive for game files. Besides which, you REALLY need another drive as well, in addition to the HDD you already have, whether internal or external, to back up the data on both these drives to so that when they fail, and they will (Whether sooner or later), you don't lose all your game and personal files.