Hi everyone, I need your help..

I will be flying to Bangkok next month its my first time ever since the wolrd begun LOL and I feel a bit scared coz I don't know what to do. And they said that the Immigration in NAIA is very strict, is that true guys? I will be flying in Bangkok via Thai Air and I will meet my bf in bangkok airport, he is the one who payed everything like the flight ticket and hotel reservation.
What are the common question that the immigration usually ask?
Do you think they I will let me go out the country?
Please I really need you advice and opinion.
Thanks a lot guys!
God Bless you all.. <3