No idea of my daily calorie amount now or then but I'll give you a rough idea of how I lost almost a stone about a year ago. I don't like diets or constantly weighing yourself as I think it gets you down.
Breakfast:- either oatso simple with skimmed milk and blueberries or yogurt, blueberries and small serving granola - yogurt is full fat.
lunch - either soup and slice bread without butter or salad - with protein like chicken slices, Quorn fake chicken/ham and tiny bit of carbs - usually small bit of potato, add yogurt or fruit. make portion small - half of what you'd usually have.
Dinner - protein like fish, meat and veggies and either rice/pasta/potato but really halve the main portion size and halve the carbs - e.g. a quarter of a potato, less than a palm sized portion of pasta etc.
Snacks - do have them - not too many but if someone is offering cake, biscuit etc have some - maybe halve it or one biscuit but don't deprive. Also hummus and crudites etc (the snacks you buy in Waitrose/Boots) are a good extra snack.
Drinks - if you go out for an evening have alcohol/slim line tonic etc - don't deprive but don't do it a lot.
If you find your weakness is carbs - mine can be a jumbo bag of crisps, whole pot of dip with crackers etc - then either cut it out if you can or have e.g. small size of crisps or a quarter of dip with crackers. Then you're not depriving yourself. Make it 1 x a week - e.g. treat.
You need to walk fast (so you're slightly out of breath) for about 10-15 minutes a day, every day (or every other day) and do it ideally for a month if not more to start. If you can do this every day even better. Maybe on your walk do 30 mins of this and the rest normal walking. I did this on my commute to work - partly as I didn't want to be late, then partly as I knew it was good exercise and I could fit it in then. Gentle walking will not cut it!
Try to be active at work and home - take stairs rather than lift etc, on public transport. Log your steps on fit bit.
A class or other activity twice a week is good - aqua aerobics very good as you work twice as hard in the water or even energetic (vinyasa/ashtanga etc) yoga etc is good.
What I find also helps is thinking of clothes you want to get into - give yourself a goal - your birthday party.
You should see results within a month at first, 2-3 months total but you have to stick with it - and then ensure you don't put it back on! Good luck!