First time Experiences

[Sir Pwn A Donk]

With me being a poor high school student with only a part time job, there's only so many buyins I can afford before it will take me a while to rebuild enough from my job that I can play again (I have about $400, enough for 2 full buyins at 1/2NL where I plan on playing.) I played online mainly sngs and MTTs (started out losing a bit, but my ROI steadily improved to where it is now). I have played a bit of ring, and have had some success in the small sample I've played. But, I have no clue what to expect at a casino as far as play quality. I was talking with someone and they said it is equivelent to .01/.02 online. I know I can beat that level (started out before sngs grinding there), but with me only having 2 buyins I am worried about going broke. What was your first experience like at a casino? Did you end up up, down, were you new to poker or experienced from online play? Would it be wise to maybe grind blackjack first?