I posted awhile ago and finally got an SSD.
I opened the PC up, there were only plugs for 1 storage drive, I have everything already backed up so I just put the SSD in and took the HDD out that is fine.
Booted from USB and installed W10 Home.
Installed all Windows updates and it is working fine.
Then remembered about “over provisioning” that comments from another Ozbargain post told me. Whoops.
So I quickly read online, and used Windows “Disk management” to shrink C drive by 10%.
So I have 10% un-allocated space, this is the same as over provisioning I read (SSD firmware should auto recognise this un-allocated space).
Then I remembered the “trim” feature. I opened Windows “defragment / optimize drives” and clicked optimize, but it still shows as “never” run. I did it again, still shows as “never”.
Kind of worried but ok, just turned computer off I have had enough for today.
If experts could please comment that would be appreciated, if this is all fine / job well done. Thank you.