Hi, and welcome. NEVER give up on getting healthy. I'm 49, and I've been "dieting" since I was in my 20s. Suddenly, THIS time, something worked; I don't know why, but it did. It will happen for you, too.
After looking at your plans, I am afraid you might be eating too little food for the amount of exercise you are planning. I'm not sure how many
calories you need for your weight and activity level, but I'm sure someone here can help with that. You just make sure you are giving yourself what you need to reach your
goal!