I’ve bought everything to upgrade my PC but hadn’t got round to it and decided better wait further as if something goes wrong while we are in lockdown SWMBO wouldn’t be happy.
you need to check the size/type of connection the current hard drive has and make sure the SSD is the same,
I bought a Samsung 970 eco SSD and intend to use Macrium reflect to clone the hard drive, cable or enclosure
should be ok.
I am only upgrading to SSD to handle large photo files,
personally I would upgrade the RAM first if it’s possible, if they have spare slots for extra RAM you just plug them in.