Definitely rest the skin several days to let it heal before trying again. In the meantime, maybe order a blade sampler pack, or at least some blades that most people regard as decent (sorry, can't recall which those would be).

Next, when experimenting with the angle of attack, start with the handle held pretty much perpendicularly to the skin, then slowly lower the handle towards the skin *just* until you're cutting whiskers. Learning this angle is key, because at the right angle, a DE razor should cut a properly prepared beard with almost zero pressure against the skin.

Finally, while you're still in the steep part of the learning curve, I'd focus more on getting a passable shave with as little irritation as possible, like Troggie said. Go for a closer shave only once you can do that consistently.