A lot depends on personalities and your relationship. My wife and i started with separate checking accounts 10 years later we still have separate checking accounts. Like anything it has it's advantages and disadvantages. But it works for us.
She makes about same amount as me so it works out okay. We used to split everything to keep it simple. Now a days she pays for childcare and I pay most of the bills. We help each other out when needed. And she gets to spend her extra money and girl things and I get to buy dude things. We NEVER argue about money which is really nice.
We have several joint savings accounts that we both contribute to on a regular basis. We use those for large purchases like home repairs, vehicle repairs, vacations, etc.
A budget is a must. We are fortunate that our debt is fairly low and we don't live paycheck to paycheck. We both see the value of saving for our retirement and have put a lot of focus on that. When we first got married we saw a financial counselor for advice. He pretty much gave us a list of things that we needed to do to protect ourselves financially and we've stuck to that plan and it worked out well. He didn't even try to sell us anything or charge us for the consultation. He said he was so thrilled to see young people interested in financial security.
Good luck.