Remember that he is free to have his own financial ideas, persuade and don’t impose your own on him. Try to do your best to find a man that matches your idea about finances as much as possible. Be prepared to support him in rough times, through crazy ideas and career changes. Changing from a job that has a lot of earning potential to one that is more meaningful, reasonable and enjoyable is a common step for men to make as they mature — this change is great for him and great for your time together: treat it as such.
Speaking of money early on can be déclassé. However, you must address this issue quite clearly at least before you live together. Agreements before cohabiting and prenuptial agreements put your mind at ease as well as his. It serves to remove the necessity of speaking about this when the relationship is on the rocks or ended: it cheapens the relationship at worst and is an emotional nightmare that brings out the monsters in both of you at worst. Agree how bills are going to be paid with little coercion. The Keep It Simple solution for splitting everything in half is tempting but this can generate resentment in either one of you. So negotiate taking into account any differences in income, your ideas about lifestyle and gender roles, how you each use the utilities. If you make any compromises, be happy about them as a choice: you are sacrificing money for happiness with your partner. Having everything in writing is preferable: you are both clear about where you stand and what you agreed to.