Op, I completely understand. Look up "The Scarsdale Diet". It's a strict, but super-healthy, diet from the 1970s that encourages fast weight loss. It's basically low-carb but you get loads of fruit and veg too. I lost 3.5 stone on it a fe years ago, starting in June and finishing in October. I kept it off for 6 years.
Keep your meeting uppermost in your mind - it's inspiring! Use it to motivate you in the gym, etc.
I now have 4 stone to lose. I piled it on when I quit smoking a year ago. I've BALLOONED, really quickly, so I get how daunting it is.
Try to remember how just losing 1 or 2 pounds quickly boosts your mood and your motivation. After 3 days on a diet, you'll be well away. Even 5lbs makes your jeans fit better, 10lbs makes you feel amazing and 14lbs is a whole dress size!
I'm so daunted by my weight loss goals. I've never ever been this fat, ever. It's like smoking kept my weight around a certain point; when I quit, the fat-floodgates just rushed open. ☹️ But a few weeks ago, I lost 7lbs, and I felt so, so much better.
I'm totally up for being your weightloss buddy!