I think there may be some confusion in the word “seminary”. There are 2 types- Minor and Major.
This is the way it was explained to me -
Minor seminary is like a 4-year college. Your ‘majors’ would be theology & philosophy as well as all the general educatoin requirements needed to obtain a Bachelor’s degree or it’s equivalent. Young men who are discerning may or may not choose this type of setting for their under-grad work.
Major Seminary is where the actual “formation” in the priesthood takes place. Men are required to study, usually for their Masters in Divinity.
Here is a link to the Theological College at Catholic University. It can give you some more information about actual seminary life, and the requirements for their program. Most in the US are similar because of the “Program of Priestly Formation” which I linked to above. I strongly reccommend that you read it, especially the Introduction.
Please understand I am not trying to discourage you. I do some volunteer work for our vocation’s director, working with young men who are discerning, so I do have a little more knowledge than the “average bear”.

If you are serious, you really need to get your diocese involved, and accept any and all advice/help they give you.
Peace be with you on your journey, and I will pray for you!