Ok, I've got a minute now I can offer a proper response, not to discredit my previous reply as it remains tremendous advice.
First off, adulting sucks. Everyday on your own, you'll wonder why you didn't listen to the people who told you to slow down and just be a kid for awhile. That being said, you have to do it and the sooner you rip the bandaid off and get to it, the better.
If you aren't already planning for retirement, start. Even if you're putting ten dollars a week into retirement, it's something and if your employer offers a match that you aren't taking advantage of, you are literally leaving money on the table, and you'll need that money. You'd be well advised to max out your retirement, but I understand that's not feasible as an entry level employee so just recognize that that is the goal you're working towards. The key is to try to position yourself as best as possible. Also, although not recommended as a primary plan, you can borrow against your 401k in a pinch. Again, not recommended, but it's better than being homeless. I suggest you pick a reasonable 5% contribution to start and then, if your plan allows this level of control, every time you get a raise, split it with your 401k(i.e. you get a 5% raise, increase your retirement contribution by 2.5% and put 2.5% in your pocket). Small increases are barely noticeable, especially if done in this manner, but the compounding really adds up.
Money is the reason most people struggle in life, so you need to slay that dragon. there are dozens of gurus that have written hundreds of books and so forth on the topic of personal money management. While he's a little too preachy for my taste, Dave Ramsey has some good ideas and has helped a lot of people figure out how money works, which is the basic foundation of smart money management. If you don't understand how money works, you don't have a chance, so learn. Start with interest because if you don't understand that, that's where all your money is going to go.
If you're not living three to six months ahead of the curve, you're doing it wrong. Take a breath, most people are doing it wrong, myself included. It takes an incredible amount of dedication to do it right, but once you get there(I visited this beautiful land for a time), life just gets easier. If you can, do the work, make the sacrifices, and get ahead of the game.
Living alone is great, but is it worth being perpetually bordering on bankrupt? This is a personal choice, no doubt, but one you need to consider thoroughly. Having a roommate for a few years doesn't mean you'll have one forever. Whether alone or with others, live cheap for awhile until you have a path laid out. My first year on my own, I lived with basically no furniture. I had a bare bed frame, recliner, tv stand, and a set of four tray tables that functioned as my night table, end table, dining room table, and valet table(best 50 bucks I ever spent). Overtime, as I could afford to(in cash), I added things, but I didn't force myself to have things because I had become accustomed to having them at my parents place. You don't need to go broke just to fill the space in your apartment. Buy what you NEED when you can afford to pay for it in CASH.
So what do you really need to hit the road on your own? MONEY! A great big pile of money. Depending on your landlord, you're going to need some combination of first months rent, last months rent, security deposit, and fees. This just covers move in costs. You might have to put down a deposit with the utility company(s). You may be required to purchase renters insurance(which you should have, but not all LLs require it). Then you immediately need to start putting money aside for next months rent. Then you need to actually move, which you may be able to do yourself without much in the way of costs, or you may have to hire movers and purchase supplies. I moved a few months ago and I spent nearly a thousand dollars to do so. Pots, pans, dishes, linen, food, cleaning supplies, the list really is quite endless, the point being plan ahead for life to nickel and dime the crap out of you when you're starting out on your own. You need a colander. They don't cost much, they last forever, but you have to have one if you want to eat pasta(dinner last night, colander is sitting on top of dish strainer right in my eye line, I am not a crazy person); but until you make pasta one night and then realize you don't own one you might not think of it. Be prepared for lot's little surprises like that.
So if you don't have lets just say six months rent in cash, you aren't ready to move out. Three for move in money, three(ball park) for immediate expenses(adjust as appropriate for your situation).
