Alright I just build my own coils after 3 times of screwing up and the lowest my multimeter got to was 1.2Ohms. I'm guessing that's okay since my battery can go down to 0.22Ohms.
BUT the bottom pin button gets pretty warm after a few seconds. That's not normal is it??
Not remotely normal. My freshly built 0.6 ohm coil even my atty isn't hot, let alone my button. First thing, tear your Nemi apart completely and clean it head to toe, double and triple check your coil for its resistance - if you're in doubt in the slightest, tear it apart and redo it ensuring you have no shorts and your multimeter is reading it correctly. I tend to be paranoid and double check my coils, once on a VV device that reads ohms, and then my multimeter, I need them to match before I fire them.
If you decide to reassemble after your cleaning make sure all your connections are still clean, on my Nemi I screw the atomizer on first, then tighten the center pin on the top cap up to meet the atty. Put that onto the tube, slip the battery in and then tighten my switch contact screw all the way down, and then put it on. Also, ensure that your Atty's center pin is also not flush with the threads, it needs to be slightly out or you could be shorting your mod through the threads of the 510 connection.
Personally I'd spend a few more hours reviewing safety videos or hit up a local brick & mortar store to have the more experienced guys have a physical look - you absolutely don't want to use this thing with it heating up. Not in the least. It's 110% dangerous.