I also forgot to mention what you'll need to buy
Motherboard, gpu, CPU,psu , hdd or sdd , OS (oem os binds to the motherboard and is 1/10 the cost of retail), monitor, desk , keyboard, mouse, case, ram, chair , tax and shipping (which depending where online could be included in price)
I don't think it will be wasted money as hobbies like these teach skills for the future