building a desktop

Hello guys im building a office pc for my brother with a good budget ( around 1200€ including monitor) i decided go for ryzen 8700G because my brother doesn't care about gaming (though im gonna add a good psu so he can have the option to add a gpu later if he ever wants it) my choices : case...

So I was recently moved into the basement because well things happened, now a place to stay at least for the short term, but I am wondering is it safe to build PC's here or am I just forced to buy pre builds?

Mbo: Asrock X570 Taichi Cpu: Ryzen 5 5600G Cpu cooler is the stock AMD one Gpu: 1060 6GB Ram: HyperX Fury 16GB 1TB Samsung SSD 240GB Kingston SSD Cooler Master 750W modular psu I assembled everything and when I try to boot It cycles through the error codes then stops at 98 and nothing after...

So, I recently bought this case-- https://www.amazon.com/gp/product/B079X2P3TR/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1--, and got it at a steal for $27. It has mixed reviews, so time will tell if the case is worth it or not, but I do want to work on finding just the basics for now, so I...