Is there a guide somewhere? There is no tutorial, and stuff like the auto resource extractor is just a waste of resources, at least early on. I also wonder if it would be better if there was at least a small chance to get resources off of killed monsters? There is little reason to kill them ever.
There's no guide apart from reading comments here, probably.
The extractor is best deployed on deposits >100.
Enemies don't drop loot when dying; any resources you may have seen were already sitting loosely on the ground around them. It's up to you to gauge whether it's worth going after them.
All of the resources are optional and are only there to prepare your crew for the final level.