First of all, as everyone has said, you have to be much older, at least 18, before a Vocation Director works with you.
Secondly, you have to decide if you want to be a secular or a regular priest. If you want to be a secular priest, you have several options. You can join a diocese. You can join a society of apostolic life such as the Vincentians, FSSP, Maryknoll, ICRSS, SOLT or another.
If you feel called to be a regular priest, you must choose between being a monk, friar or clerk and apply to the religious community of your choice.
In all of the above cases, the student does not decide where he will study. The superiors decide. Normally, only the highest ranking students are sent to Rome. That usually means that one has to spend several years at a local seminary or religious house and prove that one is an outstanding academic achiever. One has to prove that one can bring back something to offer that cannot be achieved studying in the USA. It’s not impossible, but it requires that one jump through some hoops.
The other option is to move to Rome and join the Diocese of Rome. I’m not sure how possible that is either. There are international laws that have to be observed. We will keep you in prayer.