When I build my new PC 3-4 years ago I was still completely new to computers at the time and never touched inside of a computer before, but couple of tutorial videos were more than enough to teach me everything that I needed. So yeah I hope it shows how easy it is and you shouldn't be afraid to try it, cause you will definitely save money and also learn a lot about your PC in process of building.

In case you chose to build it yourself, here are videos that you might find helpful:
Some things you should consider before buying the parts:


The build itself (most up to date and easiest to follow imo):



Also if you are looking to save money, don't buy everything at one sweep (this counts no matter if you chose to buy parts or a pre-built PC) because there are many discounts on computer parts all the time, so i'd suggest looking around different websites/different parts and buy them in a time span of 2-4 weeks. Trust me, that way you will save some money for sure.