Piano Forum

All I can say since I dont have a video on how you are playing it, or what level of learning you are, is that if it can only do slow for you , just do it slow and correctly and nail down every note of that scalar passage . Raise your third fourth and fifth fingers when it is their time to land, raise up and land and firmly drill into the piano w emphasis.
<also it helps to be physically fluent with all scales up and down the keyboard at a decent tempo, this is a basic foundational aspect of all piano students should get to have in their belt; this will help w these basic types of scalar passages, as for me, for example, not to boast, but to be factual, i never practice these types of scalar passages occurring within pieces bc i am fluent in all scales. these are incidental areas of a piece. you should get to that point. hope this encourages you , again, not boasting , just being factual <you can never emphasize that point enough on an internet forum; theyll always misunderstand you or figure you the wrong way if they have a choice>>,
How long have you been playing this ? if only a few days or weeks then it should be no special for you, even many advanced students I know will take more than a few weeks or a month or so before getting up to tempo.
Because you want to nail the passages properly w correct hand/finger /wrist movement and firmly. You have to get that into the muscle memory (low short distance memory to the spine) into the fingers .
The grace note on the 64-2 play them as separate notes for now. nail each note, the grace note, and then the chord. be  confident enough to nail these two notes then shorten the timing between these two notes later. Let your fingers firmly basally understand what they are trying to do. engrain it deep into muscle memory. Your fingers have to be familiar w that movement.
That for now. Well..perhaps it will solve it all for you good luck.


oh, and also on the sustain of the f yes, you can hold pedal down it is fine, it is not cheating. however you should be able to reach the c and ab with your second and thumb on left hand. It is doable (chopin etudes address these types of issues , once I thought there were several finger contortions which were impossible but now I have a larger set of tools of finger contortions, not that youre interested ), but if youre not there to flex, then use the pedal


I really hope this helps in some way. I appreciate your candor about yourself and willingness to learn and I want to help people like you.