-What parts do I put together first? i always put the cpu , heatsink and ram on to the motherboard outside of the case
-How should I spread the thermal paste? a blob on the cpu about the size of a grain of rice or a pea
-Do I only put in one gpu then after installing everything put in the second one? i usually put the gpu in after i install the mobo into the case.
-How do I have it so certain things are put on to my ssd and others on my hdd the first time I boot it up? when you are ready to boot up your os leave your hdd unplugged
-Should I test it outside of the case or just put everything inside ? some do some don't i usually do
any other things that I should be warned about, being a new builder. STATIC ELECTRICITY MAKE SURE TO GROUND YOURSELF . two methods to that a wrist strap or touching the case every couple of minutes . And take your time and read the instructions for all the parts. Also watch some build video's on youtube thats how i learned . Have fun and good luck