Hi. I have to apply for my F-1 visa in a few months, as I have to enter the US for studying in the fall of 2021. My uncle is a Legal US citizen and has applied for the I-485 petition long back, and it has around 2-3 years remaining. I might turn 21 before the petition is over. I am not sure if the petition will cause difficulties in acquiring the F-1 visa. Please let me know if it will cause any problems and how these problems can be solved.