A Lord's Way of Farming and Becoming a King

You are a serf, you work all your life, and all you want is rye bread for three meals a day. You want to save money and live frugally in exchange for an opportunity to transcend class. Unfortunately, you have to go without food and water for ten thousand years to get an opportunity. You are a serf, and you want to fight the enemy bravely on the battlefield in exchange for a chance to change your destiny. Unfortunately, no one among ten thousand people can do it. The solidified class, the humble serfs, the superior Holy See and the king who does not eat beef. Fortunately, you are a college student who has traveled through time in the 21st century. You have traveled through time into the body of a minor nobleman and have the right to choose your own destiny. Will you choose to be a little nobleman for the rest of your life? Will you choose to work hard little by little and become a great noble? Still say. Do you dare to say that out loud: I have a dream. (Note: The Holy See will kill anyone who promotes the development of science and technology)