Just use youtube. But all kits should have a build guide created by the makers. Try asking for it on their discord or look on the GB sale site for a tutorial link.

Alexotos building the QK75. Not a full blown tutorial but you can see the steps taken and Alexotos does a good job explaining things. https://www.youtube.com/watch?v=qRI93NcYLDg&ab_channel=alexotos

The GOAT's switch lubing tutorial https://www.youtube.com/watch?v=44Wv4OGdmu4&ab_channel=TaehaTypes

The GOATS stab tuning tutorial https://www.youtube.com/watch?v=usNx1_d0HbQ&ab_channel=TaehaTypes

It makes me sad realizing people just dont turn to the same goats of this hobby anymore. I feel like names like Alexotos and Taeha are being said less and less often which is a shame. They build this community and still have some of the best tutorials out there to learn with.