I built my computer not a couple years ago. I learned off of YT to get the confidence to build one. Pretty easy when it was time to put everything together.
Asus Tuf gaming mother board, AMD 3900x, Sapphire 5700XT graphics card, 16gb of ram, 500 gb of storage.
I should have got the 1 terrabyte storage and bumped up to 32 gb of ram but those can easily be upgraded.
I’d stay clear of alienware. Overhyped bad hardware.
You can build a better PC on PC Part picker. Give us your budget and some of us could build out a badass top end build within your budget or you could use go off someone elses build on the site.