I loved breastfeeding all three of my babies - fed dd1 and ds1 to around 13 months each, still going with dd2 (9 months). Things that really help...
1; find some actual real life women in your life - ones you like - who made it to established breastfeeding (couple of months ebf, at least) and tell them you want them to be your advocate and supporter. Doesn't matter if they're old or young - they just need to have done it themselves, and be on your side and ready to support you
2: TELL your partner you want to breastfeed and it matters to you and they need to be your breastfeeding cheerleader. You need praise, emotional support, hugs, cheers, and cake. They need to be ready to give you all these things every day. They need to know NOT to say, ' god this is hard, why don't we just give them a bottle?'. That's not helping. Telling you you're bloody amazing and they value and love you SO MUCH for doing this amazing thing for their baby (whilst passing tea and cake, and the going off to do the washing up) is helping. If you want to go over to FF, or combination feeding, when you're ready you will say so. They say NOTHING other than 'you're doing so well, i support and love you' and 'do you want some more cake?'.
3; buy breastfeeding day and night bras. Buy breastfeeding friendly clothing. Buy supporting firm pillows for your bed. Buy a nursing rocking chair. Buy lanolin nipple cream. Buy cake. Buy a doughnut pillow thingy. Treat it like you're going to war. Preparedness is everything. Do not stint. You need this shit.
4: know that (for many people) days 1-4 are ok. Days 5-8 are HORRENDOUS (nipples killing, back hurting, all lovely oxytocin's gone, you're so so knackered). Day 7 is THE WORST. After that, you're over the hump.
Days 9-21 ish slowing slowing improving. Days 21-45ish getting easier all the time. Days 45 til whenever, lovely happy 'i am a floaty earth mother' breastfeeding easy days.
At least, that's how it was for me.
Hope this helps. Hope it works for you. If it doesn't, you're still a brilliant mum with a fed, loved baby x