Hurrah for 5'8". I do love my height! Aren't we lucky!
I started at 16.5, a bit more than you, and am aged mid 50's. Very menopausal!
I've lost over 5 stone in all, (I got to 15.9 in late January if that helps) & I got to my target in mid August.
I am now 11.2 and aiming to maintain.
Some weeks I lost a pound and others it was suddenly 4. Yet I was doing pretty much the same thing week in, week out. Generally it was about 7lb a month.
I eat Protein, fibre, Healthy fats like olive oil, virtually no white carbs, some wine at the weekends. I haven't counted calories, just eaten small portions, 3 meals a day.
I bought some little hand weights and started doing arm exercises every morning. I could see my butterfly wings shrinking and muscles growing each day. I also got a yoga mat and do a few floor exercises every day to strengthen my back & core.
Swimming twice a week, and walking as much as I can.
Starting MJ was a difficult decision at the time, but it turns out it was the best one I have ever made since I said yes to DH's proposal 37 years ago!