Congratulations on your pregnancy! What are you hoping for in terms of pumping? - exclusive pumping, or enough for another adult to give a bottle of breast milk?
I wouldn’t worry about getting a pump for the early stages unless you are dead-set on exclusively pumping (which would be hard work!). If possible, it’s apparently best to let baby feed directly for the first 6 weeks or so while your supply settles. You might be fortunate and baby will get the hang of breastfeeding quickly.
If you do need to pump, eg if baby is struggling to latch and you need to top up with a bottle, you can usually get hold of a pump quickly, either buying, or I believe some hospitals hire them out. Maybe have a chat with your midwife if you can?
Otherwise, you don’t need much kit or preparation for breastfeeding. Nursing bras make access easier, but your size will fluctuate so stretchy ones are best at the start. Breast pads stop your clothes getting soaked. Lanolin balm can be helpful for sore nipples.
The most important tip I have is: ask for help. All the time. For anything you are remotely unsure of. Insist on support. Be that person, you’re not being a bother. Ring your midwife, ring the birth centre, ring the NCT or National Breastfeeding Helpline, find a la leche league support group. If it keeps hurting, or baby isn’t latching properly, or you think you might have mastitis, or you don’t know how often to feed, call for help. In the early days of BF a little timely advice and attention can be the difference between continuing to BF (if you want) and having to give up. Every mother and baby pairing is different and can need tailored support.
I BF for 21 months. The early weeks were hard but for me, it was worth it because once established it made my life easier.
Someone else might come along with advice on pumps more specifically.
Congratulations and good luck!