By bad grades to what extent? B's? C's? D's? E's? F's?
If it's the last 3 then you will have some troubles when enrolling.
If not, then what I would do is try to get into subjects I like, if I'm denied that, strongly argue my case until I get in
. To your friends just be honest, and to your parents just say I tried my best and then move onto a-levels to make up for poor GCSEs.
I can't give a full standard advice since everyone is different, my parents were ecstatic at my B's and C's I don't know if yours would be