The in person support is the most crucial factor IME. Suss out where your local support groups are, and visit them before the birth (if possible). Stick the helpline numbers in your phone or on the fridge. Locate your nearest lactation consultant, see if they have a support group or run any antenatal classes, and find out how much it costs to hire them so that you can weigh that up before you're in the situation of thinking "I'm desperate but I really can't afford this...". Look up your nearest NCT branch and see if they run a breastfeeding drop in and/or a prepare for feeding class. Look at local independent antenatal class providers as well. Check a few different breastfeeding support forums online - MN is good or at least used to be - there are FB groups as well, I've heard "Can I breastfeed in it" is good, also anywhere with an attachment parenting lean is often good, I used to go on Green Parent a lot. What you're looking for on a forum is a sense of consensus - you don't want to post and get 100 different confusing answers, but also a sense of empathy and kindness. Some groups can be unnecessarily judgemental and mean towards anyone who doesn't adopt the groupthink immediately
I wouldn't recommend staying in any groups like that!
Support groups:
www.nct.org.uk/local-activities-meet-ups
abm.me.uk/find-a-local-breastfeeding-support-group/
www.thebabycafe.org/find-a-cafe/
www.laleche.org.uk/find-lll-support-group/
Helplines:
National Breastfeeding Helpline:
0300 100 0212
(9.30am – 9.30pm)
ABM Breastfeeding Helpline
0300 330 5453
(9.30am -10.30pm)
NCT Breastfeeding Helpline
0300 330 0700 + Option 1
(8:00am - 12:00mn)
La Leche League telephone list (local/national)
www.laleche.org.uk/call/
Lactation consultant search:
You generally have to pay to see a lactation consultant, but some of them offer support groups for a low cost, such as a contribution towards tea and coffee.
www.lcgb.org/find-an-ibclc/
(The site is showing a security concern for me ATM but looks like a tech issue their end - hopefully will be fixed soon)
Be wary of independent "Breastfeeding advisors" or any other title. Some of these are quite questionable - IME it's best to stick with someone with an accreditation whether that is a title like IBCLC or whether they have an affiliation to a group such as NCT or ABM.
When baby arrives, if you're having problems or have any questions at all, your first port of call is your midwife. There is a good chance your midwife will have decent breastfeeding knowledge at least in terms of getting started with a newborn. Once you're discharged from your midwife and/or if you don't feel confident about your midwife's advice at any point, move onto something more specialised. I would probably suggest to bypass your health visitor entirely because in my experience, their training on BF is very little and/or nonexistant. You could ask your health visitor if she knows of any local breastfeeding support groups. Likewise, a GP is not usually a good source of breastfeeding advice. There are a few GPs and HVs who have a personal interest and hence are quite knowledgeable but this is the exception, not the rule.
So I would go for a group or local leader/breastfeeding counsellor/lactation consultant as a second option once you've left the midwife. If it's too long to wait for the group and you can't contact your chosen support person directly, use a helpline. If it's the middle of the night and no helpline is open, post on a forum or group online.
There is no point (IME) trying to prepare for everything which might go wrong. There might be a point trying to work out what perhaps happened last time in case you see the same patterns again. But other than that I would not suggest doing anything pre-emptively because most interventions that you put in place can cause problems if used inappropriately. What I would suggest is to spend time in breastfeeding-supportive environments, whether those are virtual or IRL both before you have the baby and after they are born, so that you get comfortable to ask questions and seeing breastfeeding happen.
It is common to have problems (about 2/3 of women have problems, about half of those stop before they wanted to) but I wouldn't say it is very rare to have none! You might get lucky.
Give yourself small goals as well: I will give one feed / I will give colostrum / I will get through the first week .... etc, expand as you go. Then it's viewed more through a lens of "I did as much as I can" rather than "I gave up before I wanted to". Remember BF doesn't happen in a vacuum and stopping can be the right choice, if the choice to continue BF means a lot of pain and inconvenience.