I'm planning on building a pc for the first time soon and I would just like advice on what I can do to improve my build. I want to stay under or around $1000. Also I plan on using the Thermaltake Versa H18 case instead (or something of a similar size) and it isn't on pcpartpicker, how would I go about making sure that every component would fit?

https://pcpartpicker.com/list/xcvRsp