Question

Hello Rabbi,
What advice does the rabbi give to someone who wants to find a relationship and begin dating?
How should one approach it? How do you know when the time has come? What takes place in the marital 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 the relationship is built after the wedding, and before that they only examine whether it is suitable or not. What does that mean? Are feelings supposed to 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 thoughts, and when does that create excessive closeness?
Thank you very much!