I need yalls help fellas

So there is this girl I like her alot and today first time we talked IRL and I asked her that do she wanna share contact and she gave me her contact no. . Now I gotta text and built up the convo

I just want y'all to tell me that what are the strict don'ts to text her so that she won't feel awkward or anything or whatever just tell what are things I should not text or behave and everything and also plssss tell me give me tips to build up the convo. Seriously batao yr😭