There's no such thing as 'too expensive for my first PC'. It is completely down to your financial situation - i.e. if you can afford it, then go for it! Nowhere is there a rulebook saying if you're new to building/using a gaming PC, you have to use cheaper parts.
All I would say is (if you are using expensive parts) to be extra careful. But use YouTube guides and the Tom's site, and you will be fine.
Hope this helped
