@Faith-and-Hope 😁 Computers are just a series of wires, chips and points - if you know the basic structure of the motherboard and have the right specs then it is quite easy. I learnt a lot from my Dad when I was younger so can fix the basics on a lot of tech - the harder parts I will still get done by the experts but replacing a few parts that are easy to replace (ie. unplug/plug in, visible wiring, etc.) I can do myself. ...saves a lot of money too which is handy.