jobs and easy one then:
My basket at OcUK:
Total: £75.32 (includes delivery: £0.00)
remove the current ram and install the new ones
plug in the ssd (also specced a sata data cable that you'll need, but the power supply should have extra power connectors so no need to buy any extra power splitters/cable)
you'll need to reinstall windows to the ssd and use the ssd as the main drive with windows and all other programs, the current 1tb hard drive can then be your storage drive
ps: i have not specced a m.2 ssd as i don't know if your dell motherboard supports this. all motherboards have more sata ports, so the specced ssd is a slot in, as far as a hardware upgrade is concerned (you'll still need to do the relevant software changes listed)
why you need an ssd: