Hello. I was a breastfeeding counsellor for twelve years. I fed my own dd until she was four.
Its no big deal and you don't need equipment or advisors, though all that would be fun if you had it. But you don't, don't, need it. A doula or well-behaved grandma would be a real asset, to do housework, childcare and to cook your meals.
I hope you're already resting a lot. Rest more, bed rest with baby (by you or with you if you co-sleep) is best.
Stay hydrated with frequent sips of water. Have your main meal of the day (with protein) at lunchtime and a nourishing smoothie mid afternoon (google tiger milk). This is to boost your evening milk production. It falls if you've had a busy day and a late heavy meal.
Whatever you are feeding your baby now, continue with that. In a few weeks, when breastfeeding is established, she won't need it.
Put the baby to the breast. Aim for 24/7 contact. No dummies. Because she's already reliant on bottles, you will need to work up to 24/7, as she'll need some breaks so that she's ready for her bottle. At this stage of life if she's sucking, she thinks she's getting food, so you have to be aware - that's why you don't cut down on formula at first.
Your 'perfect' routine is "Baby at the breast with access to the nipple constantly. She doesn't always suckle but every twenty minutes or so, she'll have a little suck."
Every time she sucks, she's stimulating your milk production. With lots of rest, suckling and skin contact, milk should come in. If you're running about doing childcare and housework, it will be more of a challenge but not impossible.
Expressing - do it (when baby is asleep or unwilling to feed) with your finger and thumb, stroking with slight pressure from about half-way back on the breast, towards the nipple. When that milk comes in, you'll see it shoot across the room. My first attempts brought one or two paltry drops which I dutifully kept in a tiny bottle in the fridge. Yes, you can express straight into a small sterilised bottle and store. I didn't keep mine more than 24 hours but there'll be up-to-date advice on that on the internet somewhere.
Good luck.