The MOST important part of staying lean and being healthy. This is where ALL your focus needs to be. I can’t stress this enough; You cannot out exercise a bad diet.
People always underestimate the amount of calories they eat (and drink!) and always over estimate what they burn at the gym. If you think a 15 minute jog (100 calories burnt) earns you a large takeaway pizza (3000 calories approx.) then you are in denial my friend!
What does a person of your height, gender and weight need to be eating in calories per day to lose weight? That’s the first thing you need figure out.