Dating and serious questions

I WANT ADVICE SPECIFICALLY IN REGARDS TO DATING APP RELATIONSHIPS but others are welcome to share( I’m a girl btw)

I’m not really seeing anyone right now I’m just curious because I am trying to date right now. I want a long term relationship, preferably dating for marriage. I’m not trying to force anything, but I do know I want to develop a serious relationship as times go by.

When do yall usually bring up serious conversations, or deal breakers you have in a relationship. Do you just confront them as they arise or do you attempt to talk about it before they become an issue so you don’t want time.

I personally have different types of things I care about that I put on different levels of seriousness or relevance. I do thing some things I can budge on I’m not a brick wall I’m just wondering when it is an appropriate time depending on certain topics.

I’ve never really been in a serious relationship. My biggest fear is pushing things off until I feel trapped in something I don’t want. I am a bit shy when it comes to certain topics and I don’t want to be to forward or not forward enough. It’s a bit weird dating using apps because I feel as tho the stakes are just different and the way to go about things changes.