HELLO GUYS , i highly recommend that you get these addons .
it is very usefull
for rigging models : https://superhivemarket.com/products/auto-rig-pro?search_id=46613411
some people use rigify ,which is free and it is already in blender, you can learn rigify on youtube if you do not want to pay for auto rig pro. i personally only use auto rig pro on my models , i recommend the full version ,which has remap
for animation : https://superhivemarket.com/products/animation-layers?search_id=46613400
very usefull i will make tutorials , with that . it really helps to add details, and fixes to animations
simplicage: https://superhivemarket.com/products/simplicage?search_id=46613406
i dont know if there is currrently a better alternative but this is what i was using before for jiggle physics for pecs, butts etc
im sharing these with you , if you have more than enough money ,and want to learn animation...i am not alloed to send you the versions that i have it would be pirating but , you can contact me on discord for more info