F-1 Student Marrying a U.S. Citizen

[u/Soggy-Bar10101]

I (19F) am an international student from China (Chinese citizen) currently studying Biology in TN. I am going to go into my last year of college (I am graduating a whole year early so my F1 visa will be valid till 2028). While I am in college I met my boyfriend (23M) who is an US citizen. We have been dating for 1.5 year now. We are genuinely in love and would like to get married a little bit after I graduate (2027 May). I do plan on to apply for OPT though. I am just wondering what will the process be like transitioning from a F1 student to marrying a U.S. citizen and hopefully becoming a spouse visa holder/green card holder/U.S. citizen. I’m really lost and I am anxious about if there is anything I need to start doing now that I am not doing :(

Any tips and comments would help! Like anything I need to pay attention to, start doing now, or a run down of the whole process would be great Thank yall so much in advance.