A thought. As a kid building a pc is something I would have really enjoyed doing with my dad. It’s not that hard to build an pc and there are lots of good tutorial videos. The above build is a good one and I know my idea will cost more but with Black Friday next week you can probably beat those prices. Anyway, my idea. If you buy from scan.co.uk they offer an insurance that also covers accidental damage, therefore takes out any financial risk of if you cause any damage while building. It is unlikely you will damage anything if you take your time but it gives peace of mind. I feel it’s very reasonably priced for the level of cover, I can’t say how much as it varies depending on the parts you buy but I’d expect about £25 on a £750 build. As an activity you can do together it might be worth considering.