Extra help socialising my 18/19mo Staffy

Hi everyone,
I know that there's an article on here about reading a dog's body language, but I've only had my 18/19mo girl for a week and am still finding it hard to trust her being around other dogs. She's not desexed either. Should I just carry treats with me where I know new dogs will be? For example when taking a different path on our walks. I know that if she's provoked by another dog that barks at her from behind their fence that she'll pull and jump up and bark and snarl back. The scenarios that I have running through my head is if I ever take her for a walk to the news agency and leave her outside their door and have another dog walk past that she might not particularly like and have her get narky with them, or otherwise take her for a walk down to the river and let her off her lead for a run but then have her run into another dog she's never seen and/or not take a liking to and then have her have a go at them too... I suppose what I've read about Staffies originally being bred to fight other dogs and them only liking particular dogs has kind of scared me, especially considering I have seen two dogs lock each others jaws onto each other and not let go for a good 5 minutes... that was terrifying. I don't want that to happen to my Rosie I'd love to be able to train her to become a social butterfly, but do know that every dog is different. I once looked after a Dane x Staghound that had a heart of gold, I could walk her off leash, leave her with any child or other dog, and never did she bark... Maybe my expectations are too high for Rosie??

Apologies for such a long post, but being able to socialise her is a big big deal for me.

P.S. She will be getting desexed once I have the money for it.

Do you know anyone with well-behaved, calm dogs that you can let Rosie meet? If so, then meet with them, let them sniff, and then walk them together. If they seem to be getting along, let them walk together a bit closer, and if they continue getting along, maybe see if they want to play. Obviously this is a slow process cos you want to make sure she's OK with the other dog. Failing that, whenever you see a dog on your walks, ask if the other dog is friendly and if you can bring her over and see how she gets on. Presumably not everyone will be happy with it, but if you're up-front about it, I'm sure a lot of them will be willing to help you out. The problem with that is that you can't be sure if the dog actually is friendly or not.

as above the best solution is help from friends with understanding , a long training line and high value treats and good recall is a must though. You cannot force your dog on anybody and must always be under control, but when you meet other people with dogs try to stop and have a chat whilst keeping some distance to get them both relaxing and not feel threatened by each other.
Ultimately you should always clip on when you see another dog approaching and be on constant alert always looking round for unexpected meetings