Second marriage attempt

Please advise to be mentally prepared just in case of another blow out. I have read a lot of self help books, healed and worked on my mistakes. No blame game. Just casually open to dating and take it next level. Of course it doesn’t mean i will never attempt another marriage. Open for some suggestions to keep doing better. Dealing with high conflict and custody and finance issues already.

Does prenups help or it can be disputed?

Thanks