Geometric Dimensioning and Tolerancing

you or your company needs to own this book: https://www.amazon.com/ASME-Y14-5-Dimensioning-Tolerancing-2009/dp/0791831922 it is the definitive standard. additionally, this book is also really good in interpreting the standards book.: https://www.amazon.com/Geometric-Dimensioning-Tolerancing-David-Madsen/dp/1605259381 much more affordable. it has a good selection of examples in the back that you can borrow from. good ole' GD&T basics: https://www.gdandtbasics.com/gdt-symbols/ pretty solid guy, dedicated one would say.