I second what @anon64938381 said. How can anyone possibly offer you any suggestions or pose any problems for your setup until you post exactly what your setup is? If you’re looking for suggestions on what parts to use for your build or how to put it together, there are many many youtube videos and DIY sites that suggest and instruct many different builds with many different parts. After you have educated yourself on the options and decide on a build, THEN post your build here and lots of people in this community would be more than happy to critique it for you and offer you help and suggestions. Good luck and Getcha Roll On!
So for your batteries:
You want 2-3 of the ones linked.
2 of them in series will be 8s which = 29.6V
3 of them in series will be 12s which = 43.2V
36V is 10s and what that kit prefers. It claims you can use up to 48v but I wouldn’t trust it. Stick to 10s or 12s
So 2 of those batteries wouldn’t even make the board turn on.
I don’t see you listing specific motors, mounts, trucks… We can’t give you much help. You mentioned sprockets, are you making a chain drive?
For simplicity in a first board that will get you what you want, maybe you ought to go with hub motors and a controller that comes in a kit.