I am 14yrs old and i really want to build my own PC, i've been all over the internet and watched hundreds of videos including yours in the past year, i am also familiar with what i need and how all the parts fit together and how to choose compatiable hardware, installing an OS seems easy aswell. The problem is i have limited practical experiance in building computers (other than the occasinal RAM installation in school).
Do you think it would be wise for me to build a pc, or just go on build a pc websites and and pay the extra 17% VAT to get a less powerful machine as a result?
By all means build it yourself man! It is not difficult at all to assemble, I made my own computer when i was 15, I was a little nervous, but it works perfectly to this day!
I was 14 when I took my first Computer Technology class in High School. Spent the entirety of the class taking computers apart and putting them back together, then helping the teacher with his side projects and stuff. It really isn't that difficult to learn, you just need to take things slowly and read up so you don't damage anything.
It's really easy, especially compared to a long time ago. Once upon a time there were psu connectors to the motherboard that would fit on two ways. The first may well work the second would often throw sparks! Today things are a thousand times easier I believe, simply because almost everything is color coded, silkscreened, keyed or otherwise marked.
I was in pretty much the same situation as you, 14 at the time, having only poked around inside computers before and having seen youtube videos on the subject, but I went ahead and did it, and it worked. It's really simple if you know what to do, so go ahead.
I build my first computer at the age of 15 based off of videos and common sense so I think you can do it. The hardest part is finding the best parts to buy for the money.