Where do people go to learn blueprints?

I am making a hack and slash game, but I just can’t seem to find any good resources on; player enemy interaction, or lock on mechanics. Is there any where someone might know where I can learn how to blueprint these mechanics?

One of the best tutorials is this:

Its advanced, a little difficult from start tutorial but definitely worth it to complete.
If you finish it, you will be able to make decent prototype of game (or full shooter game)

If you look for these specific mechanics, Unreal’s Youtube channel (or other channels in general) might address these or at least something to help you out. But I assume you already did that research, so I’d say go for the forums; look up on the forums and Unreal Answers, and if you don’t find what you want, ask it yourself! Provide the picture of what you’re trying to do and you’ll probably get an answer.

The bitter, unforgiving, relentless trial-and-error god.