How to Get the Queen Married in 30 Days?

[MEDIEVAL][DUKE][KNIGHTS][CLEVER MC]My name is Susan. One month ago, I was a 20-year-old fashion-design rookie living in the 21st century. Now, my soul has switched into the body of a skinny 18-year-old girl living in an alternative medieval world, struggling to fill my stomach.
What's the most exciting thing about me, you ask?
Emmm, they order me to marry off the Queen in a month. Does it count?