How do I approach the "girl of my dreams"? (Backstory)

Hello everyone, So first things first, a couple years back there was this girl in my french class. Not exactly the person I would be friends with but I was like 13 or 14 at the time so I wasn't friends with girls in general all that much. So we did not exactly have a lot to do with each other. But fortunately we got grouped up for a project that would take a few months to finish. During that time we got a little closer and I instantly liked her. To me she was just really likeable and we got along well. But I gotta admit social interactions weren't my strength. Neither were they back then nor are they today. So after the project finished we kinda lost contact again. Then about a year later we went on a schooltrip and during the couple days we were basically talking all the time. We talked at every possibility coincidentally did a lot of activities together and somehow I began to crush on her. But unfortunately, a couple months later she went off for a year abroad and that was it for a whole year. I got over the crush pretty well but about 2 weeks before she came back home, my old crush suddenly hit me like a truck. I was fully at it again, even though we haven't talked for about a year. When we were back in school I was way to nervous to talk to her and so I just kept admiring her in awe. From everything I've witnessed she's very kind and generous and also intelligent, all really attractive aspects. And visually she is an absolute blast. She's by far the prettiest girl I've met so far. Now, after about 1 year of admiring her from a distance, now that school is about to come to an end in a few months, I realized, I can't part ways with the most beautiful girl I've ever met without even trying to win her heart. So I've decided I need to make a move because I can't pass out on this opportunity. I know I'm still lowkey crushing on the 'past version' of her that I still have in my memories but I really really want to get to know the girl better that I remember to be absolutely gorgeous. Problem is getting to know her ain't that easy because we don't have any classes together anymore and we don't really share any mutual friends, I just kinda know a few of her friends and we get along quite well.

So I don't know how to approach her. I know it maybe sounds stupid but I really have to shoot my shot. Because I could never forgive myself if I let this opportunity simply slip away. I just don't really know how.