No wonder you're feeling proud of yourself! So you should!
As for the apron belly, that much loose skin won't disappear on its own, you'll need skin removal surgery. If you have a weight loss specialist, ask them for a referral.
I lost over 50kg and I'm shorter than you. I lost weight for my health, it was never about how I looked, so I also felt strange about everything about my new body. I went to see a surgeon, thinking he would tell me to go away and come back when I lost more weight. He didn't! He was amazingly kind and caring, explained why a simple tummy tuck wouldn't be right for me. He could see abs under everything, where I could only see flab. I ended up with a 360 lower body lift and muscle repair. My body still has some weird bits and some wobbly bits. Many would go back, but what I had done already was enough for me. Most importantly, my health is good.
That said, if you want to go to the Beach Club, do it! Yes, there will be plenty of model types and influencers there, but I bet there will also be people larger than a size 16-18 too. A nice, flowy cover us while you eat would be my advice. All of us pop out or spread a bit in the middle while sitting eating, but really, you do you, go and have fun!