when i first started knitting, i was really tight. that's how you keep the stitches on your needles, right?
i loosened up with time. now i can knit tight, normal, or loose. usually it's more normal, but tight/loose isn't a problem, i just have to make an effort to think about what i'm doing. you will probably loosen up as you keep knitting.
i would suggest doing a gauge swatch first if you're following a pattern. if you have too many stitches per inch, just go up a needle size (or two). if you're just knitting "off the cuff," don't worry about it.
fyi, if you're ever interested in knitting dishcloths, the tighter the better. they're small, but they're real workhorses. the tight stitches will never threaten to come apart.