How should I approach a girl I like when we’ve only had a few interactions

Guys, please don't care about my English 😭. I'm a guy in my second year of college and I've never been in a relationship before. There are three streams in our college: Business, Humanities and Science. I'm a Humanities student, and the girl I'm talking about is in Business. I first noticed her during our college freshers' day. She was singing on stage and honestly she has an amazing voice. I had a small crush on her, but I didn't think much about it. Later, I asked one of my friends who was in her class about her name. Days passed and I was busy with my studies and other things. Then my friends started telling me that she and her friends were looking at someone in our group. At first I thought they were just joking, but eventually I started noticing her looking at me too. I was too nervous to hold eye contact for more than a second or two 😂. Then one day, while I was hanging out with my friends, my crazy friends took my phone and messaged her “hi” on Instagram 💀. We already followed each other, so I was freaking out. She replied “ha,” and I replied around 8 hours later. After that she didn't reply for about a day and I felt really bad. A couple of days later, I started noticing her looking at me more, and sometimes her friends would look at me too. I tried not to think too much about it, but I still had feelings for her. Then our exams came and somehow we ended up sitting near each other in the same exam hall 😂. During the exam, I noticed her looking at me a lot. At one point I asked her if she knew an answer, and she said she didn't. Later I asked about another question and she knew the answer and told me. About 10 minutes later, she asked me if I knew another answer. After that we started talking about the answers we knew, and honestly it was actually fun and comfortable. After the exam, I think she may have waited for me, but I didn't really notice at the time because I was with my friends. Later, there was a huge festival at our college. We saw each other, made eye contact, smiled and gave a slight nod. After that, she liked one of my Instagram stories once. Now here's where I'm confused. I've asked one of my friends to talk to her on Monday and tell her that I like her and ask how she feels about me. How should I handle this situation when I haven't talked to her that much outside of college? Should I let my friend tell her that I like her, or would it be better for me to talk to her myself? And if she says she's interested, how should I approach things without rushing? If she isn't interested, how can I handle seeing her regularly for the next several months without making things awkward? I'm 19M and honestly pretty nervous about the whole thing. 😭