Offsets?

I mainly do CS:GO hacking, but recently I have been wanting to learn how to make a minecraft inject client. I have some knowledge of this sort of thing as I have developed an esp hack for CSGO for a few friends. The thing is, I do not know enough about offsets, base addresses, and more. I can make stuff work but not find that.

SO, with the inject client: I want to modify knockback in game using an external hack, but I do not know where to find the values that control knockback. Any ideas?

Minecraft is run in java, yes you can inject stuff into it, but it probably won't help you at all. Just look out Minecraft how to make hacked client. You will need to know java