EASE

DUIK (free)

Without more information on exactly what you want to achieve any advice will be very general.

There are a many plugins that can be used to make easing curves in AE. 

To that I like are:

Flow: https://aescripts.com/flow/

and

Ease & Wizz: https://aescripts.com/ease-and-wizz/

Flow gives you a more intuitive graph editor and ease and wizz does it with scripts.

There is also an add on called Ease Copy (https://aescripts.com/easecopy/) that I like that lets you copy/paste easing from one property to another.

Try Editing the curves using the Value Graph instead of the Speed Graph. More details: https://adobe.ly/4jytfaa

Let us know how it goes.