First actual pc build, is there anything I'm missing?

LxnaLFT

https://www.microcenter.com/site/content/custom-pc-builder-intel.aspx#selector_8 This is the build I have set up currently, gpu is empty as I'm taking the 4060 I have and putting it in there, and I already have a mouse and keyboard. I'm unsure if I need a 2nd ssd, as this is going to be a gaming pc and I'll have a seperate streaming pc. I also don't think I need a harddrive but I could be wrong? I also really don't want the case that I have picked out, it's not bad but it's the first one that I found that fits a 360mm aio. I originally wanted the lian li 011 air mini but it doesn't fit the requirement. I wanted a basic black case with no rgb at all, and that comes with a fan or 2, but I will buy fans if needed. I also wanted to know if when having micro center build it for me, do I have to seperately pick the cords for the motherboard? As I said I'm new to this and would like it to go as smoothly as possible for pretty much the budget that is already set up in the link. If there are any improvements I could make or if I should be getting anything else I'd greatly appreciate any feedback.