Newlyweds, how should we file?

Here is some info. We bought our house in December 2015. Had our first child in January 2018 and were married in September 2018. I was on unpaid maternity leave for 6 weeks, switched to a different location for my company in late August 2018, and went part time November 2018. I grossed about 23k last year and my husband grossed 40k. My questions are..... Should we file married jointly or married separately? If separately, should I claim our daughter and our house or should he? Also, he did not have health insurance after mid April last year and I of course lost benefits when I dropped to part time. Would that affect how we should file? I apologize for all of the questions.