Question

Hello Rabbi,
What advice does the rabbi give to someone who wants to find a relationship and begin dating?
How do you approach it? How do you know when the time has come? What takes place in the relational sphere before marriage?
https://mikyab.net/%D7%A9%D7%95%D7%AA/%d7%aa%d7%a9%d7%95%d7%a7%d7%94-%d7%91%d7%93%d7%99%d7%99%d7%98%d7%99%d7%9D
I saw here that the rabbi wrote that a relationship is built after the wedding, and before that one only checks whether it is suitable or not. What does that mean? Do feelings come before or after? What exactly should be checked in order to determine suitability? What do you do with doubts? How much should you share your thoughts, and when does that create excessive closeness?
Thank you very much!