Timing for Animation, 40th Anniversary Edition https://www.amazon.com/dp/0367527758/ref=cm_sw_r_awdo_3532QH0DR88G51R5VC86
You need to work on your arcs and your eases (in betweens) and timing.
Timing for Animation, 40th Anniversary Edition https://smile.amazon.com/dp/0367527758/ref=cm_sw_r_awdo_navT_a_R4HPAR7ZK1YZT2HWZVZH
Cartoon Animation with Preston Blair, Revised Edition!: Learn techniques for drawing and animating cartoon characters (Collector's Series) https://smile.amazon.com/dp/1633228908/ref=cm_sw_r_awdo_navT_a_GS0YWBFXA2JHQ9R7XW70