I am kinda considering taking the pledge but it is a big ting to do so can i have some information and the pros and cons? and how do I tell my paretns?????

well i would suggest sit your parents down and talk to them about it. i'm sure they would be happy taht tu are sharing this info with them.
as for pros and cons they can go on forever.
pro: tu are 100% seguro from STDs, pregnancy.
in a way for your future spouse, tu are giving him a gift ( in a way)
cons: exposed to STDs.

there is much más but too much to lista them all. i would suggest getting a confidante so tu could talk to them.
i would also suggest checking out thsi workshop called no apologies which could give tu a better idea.