Quick note on Hannon exercises ... Don't let all those 16th notes intimidate you. Hannon is for strength building, and should be learned VERY SLOWLY. In fact, painfully slow is a great approach to start. Use very heavy finger action to build up your muscles. Gradually, move to lighter touch, and build speed as your muscle memory kicks in.

https://www.hanon-online.com/the-virtuoso-pianist-part-i/hanon-exercise-n-1/