Looking for tips / vids / guides for Apex Legends

I recently got into Apex and I'm looking for ways to up my game. I have the basics down, I'm relatively familiar with the weapons, legends and maps, but I'm interested in strats to help me up my kill ratio. Specific tricks I can practice to help me survive or get the drop on folks, etc.

I'd also love some suggestions for skilled (or fun!) streamers to watch. I'd like to watch what better players do while I'm not actively getting turned into swiss cheese, ha!

Thanks in advance.