Mental Arithmetic

I am endeavouring to overhaul how I approach mathematics. I want to start with my mental arithmetic. I have set out the 100x tables, subtraction and addition single-digit calculations to be memorized on sight, prime numbers, perfect squares and cubes. What else can/should I work on to lay that groundwork down? I have a system for storing large figures on my figures, which I developed, and general Vedic methods for multiplication and one for division. I have a method of finding the GCF, Euclide’s method. I have a major system up to 100. I can’t think of what else I can do. After this I want to apply these rote memorized facts and well practiced methods for algebra, calculus etc. Is there any advice you can offer me? I am very open to new insights and methods. Thanks for your time.

Kind regards,