Well I had literally written a giant post that was about 3k words long but the silly forum idled me out and lost my post..... On that note Im going to keep it short and sweet.
Basically this is what you must know. Consider alternate coins if you dont want to jump in with big hardware.
ASICs come in all shapes and sizes and price ranges. For learning the ropes but not really making much profit USB block eruptors are good. Up from them would be the BitFury USB which produce 2.5GH for the same amount of electricity as the block eruptors, but these are not so good on the $/performance ratio. Right now entry level $/performance probably goes to the asicminer blades which run ~$300 and provide 10GH/sec, and can be installed onto a backplane supporting up to 10 of them for a total of 100GH.
To earn 1K per month mining you need to be prepared to dish out several thousand dollars right now, and continue to invest more into hardware as time goes on.
www.bitcoinx.com can help you predict if its worth it to you to mine BTC.
www.coinwarz.com will allow you to gauge alternate coins. Right now if you have a small amount of hashing power alternate coins are much more profitable.
Once you find a coin you want to mine search around the internet for a mining pool as they allow for more consistent payouts.
Sorry this isnt more detailed, and good luck.