i used to build my own, and yes, you can set up some really nice stuff with good value - but for a few years now honestly (unless you know and want exact/specific things) there are great brand/computers that will offer more or the same great results as a good DIY - without having to spend time locating parts and putting it together.
it all depends on your budget. any i7/9 (if youre doing heavy video) or i5 (if youre just using basic shit) Razer Blade, Asus Vivobook will offer great bang for buck (also some with amd ryzens are great but get a lil more tricky if you dont understand clockspeeds/turbo/threads/core comparisons).