You can do a lot in 10 months, if you want to.
Exercises - HIIT is good for cardio, which will increase your overall fitness level. Some light to moderate weights will build muscle, which will help you to increase the amount of calories you are burning, even at rest. Try to walk more, as much as possible. Take the stairs instead of the lift. Get off the bus a stop early.
I've been having a lot more success with weight loss by eating a mostly raw food diet. I do eat some normal cooked food, but try to limit it.
So I might eat fresh (or frozen) fruit with low fat, high protein yoghurt & some nutty, no-added-sugar muesli for breakfast.
Lunch could be a salad with some sprouted beans & seeds, general leafy stuff, a couple of scoops of raw veg marinated in something.
Dinner might be similar to lunch, although it wouldn't be the same food each time. I try to have several different batches of raw salads/veg prepared at any one time, I make at least one per ray, & it's then easy to grab the tubs out of the fridge & dish up a meal. Yesterday I had raw beetroot with lime dressing, raw kale salad with pomegranate & cashews, some homegrown mixed leaves, some raw mushrooms marinated in parsley & lemon juice, & a small piece of rare steak. I only had to cook the steak, pick & rinse the salad leaves, & dish out the other bits while I waited.
It takes preparation but I'm not hungry & there's almost no chance of me reaching for a takeaway menu. Everything is ready in the fridge. And I can lose 4-5lb in a month (I'm under 5'3" so that's pretty good going).
I've used a few fitness apps - MFP is ok but IMHO, there's too much room for user error when inputting the nutritional info, so you don't know if the food values will be correct. LifeSum is pretty good if you're willing to pay for it - I wouldn't bother if you can't, as you can only input recipes on the free version. However, just as good IMHO, & free, is Cronometer - someone on here recommended it a few weeks ago & it's been great so far.