No, kissing cannot cause pregnancy, please dont worry about that. Pregnancy only happens through actual intercourse. If you have basic doubts like this, it's totally okay to ask, no shame in it.
No beta, that's not how it works at all. Kissing is harmless in that sense. If you want to understand the basics properly, a gynac or even a good health site can explain it clearly and calmly.
I remember being unsure about these things early on too. Kissing definitely doesnt lead to pregnancy, it only happens through proper intimacy. Asking is the right thing, dont feel embarrassed.