here's a good tip i use
once you create an mcmeta file (for animation, pack etc)
save a copy to a folder, i have a folder filled with templates i use for that very thing
instead of having to rack your brain every time it's way easier
i also made a blog recently listing all the differences in block names between 1.12 and 1.14 if you need it
(searched everywhere and could never find something like it-.-)
Here You Gofor screenshots, MultiMC is pretty handy, lets you view them right from the app and if you right click it in the instance browser, you can upload it instantly to imgurr without an account, it auto-copies the link as well, that's how i've been posting mine as soon as i take them
i create too many packs i could go on and on about how good interpolation is or ability to skip frames to smooth animations but hope these help!