I suggest you seek the help of a qualified tax pro who can run the numbers for both MFS and MFJ (assuming you were married at the end of 2025). In my personal case (wife was CR-1, not a K-1), I filed Married Filing Separately the first 3 years we were married. Otherwise, filing jointly would have required including her significant world-wide income for the entire year. Since my wife was a Green card holder the minute she arrived in the US, she even filed Married Filing Separately the first year, reporting only the income she received after becoming a legal resident.
I always suggest consulting a tax pro the first year since there are many variables which can determine the best tax strategy. Good luck. Don't forget the FBAR, etc., if required for your situation.