I dont know what I can link to, but if you go to simple to remember or torah anytime, you can find shiurim of the type and topics you are asking on.
As for how to feel it? First, focus on whatever analogy works best for you. THhis world is like a bank vault open for a few seconds, grocery store you cn take anything you wanty from, a video game, whatever. WHen you do a mitzvah, or avoid an aveirah, imagine this. And imagine it adding up every second. It's fine if its fake at first, after time you will come to feel it. Also, the Gemrah says to imagine the world on a balance, picture ascale or sesaw or whatever. every deed pushes the whole world towars the side of good or bad. so every mitzvah you do helps the whole world a little, in ways we cant know. again, keep thinking and saying it till you feel it.