Is there a text tutorial of this approach building NN from scratch? As a dad I simply don’t have a chance to watch this. Also maybe something for more math incl

Is there a text tutorial of this approach building NN from scratch? As a dad I simply don’t have a chance to watch this. Also maybe something for more math inclined? (MS in math) Deep learning in python that is recommended in other comments is way too basic and slow and hand wavy imo.