GOING TO A POOL PARTY AND NERVOUS ASF.

Ok so I’m going to party but the thing is, I’ve never been to one let alone a POOL party…. I want to swim obviously but unfortunately I am the type to use heat on my hair and put makeup on my face. I just need advice on how I’m going to overcome the fact that it’s my first party and it’s a pool party…. I could use waterproof mascara but that’s not my main concern, I guess it’s more the fact that I am insanely insecure about my body. To an extent where I would not want to wear a swimsuit infront of others. My crush is also gonna be there so that’s just amazing! I’m gonna try to get into shape because the party is in a months time and I want to feel good about myself, not for him but ME. I just wanted recommendations on how to get fitter? I don’t have much free time since I have my end of years that end the day before the party is SO YAY

Normally if I want to lose weight I just eat diner and have a capri sun for lunch which I KNOW isn’t healthy and wouldn’t actually lead me to losing weight. Any advice would be amazing!! I would like to lose around 2 but the number isn’t the issue, more my waist size and how toned I am (or untoned LOL)

Also any swimsuit recommendations? I like padded and bikinis that DONT fall off because I plan on doing canon balls and shit like that. Any advice on all of these is useful and social advice too, my social skills are shit…. THANKUUUU