Need tips for bringing the fun back in my marriage.

So my husband and I have been together for a few years. We had our first child in 2016 and we recently decided to go for baby #2. Were not in a rush. But I feel like my husband and I are both struggling with internal issues which leads to communication issues. We seem to argue a lot lately. No fights or anything, just disagreeing on everything. I want to step up and take responsibility and bring the fun back in our marriage. Which will then lead to more sex. Any tips? Tips from people who have been together for a while would be nice. Thanks!