I just asked a girl out and she said yes. But shes shy around me and im sorta shy to. What should i do?

if she's shy, then there's a raffle that she is involved. do no longer anticipate lots from shy females. they're continually waiting for adult males to make the 1st pass so why no longer attempt and ask her out sometime? you by no skill understand what ought to ensue.

walk down the road with her. just u and her and start talking things will get better

invite her over, hang out, get to know each other better. that way you become more comfortable around her and she will too.
it may seem scary at first but you two just need to break the ice and get to know each other. talk more on the phone, text, im. just communicate.

Take the lead, take initiative. She said yes, so she wants you to, so you really don't have anything to worry about.