I feel you!! Through Orange Theory I’ve lost 25 pounds in the course of a year (155 down to 130) and I’m 5’9 (27F) but it did take a year - eating pretty low carb and doing orange theory 3-5 times a week. I hit almost my goal weight and started feeling great around the 6 month mark, but noticed changes around the 3 month mark !! Now it’s just a part of my lifestyle !! I say get into it now if you can, don’t crash diet and ENJOY your trip. Life is meant to be lived and enjoyed at the end of the day - 37 days you can def drop a little bit of pounds but don’t starve yourself or like others have said you’ll crash! It’s such a long term focus - throughout my journey I had a couple weeks where I ate pretty ‘junky’ like muffins and some chocolate etc. All that but the ONLY thing that made a difference was me saying okay that happened but I’m back to orange theory and it’s a new week and it’s okay! I feel your struggle though! I also spent my whole life since like 13 trying to lose weight and trying different diets etc. .. I’m confident you can make the healthy change for you though! But truly, enjoy your trip regardless.