I absolutely don't mean the OP should speak the local language to her child.
I actually think it's a terrible idea to speak a language you're not native speaker standard in to immerse your children.
I mean that the vast majority of the child's interactions outside the house should be in the community language if there's not a native speaker at home.
Almost all the child's friends and activities should not be English speaking IMO - at least until she's fluent, if she's going to thrive in local, non English speaking school.
We speak English at home if there are no visitors, and it is my children's mother tongue, the language they speak to one another in and they refuse to watched dubbed TV - always original language, the two who enjoy reading for leisure both prefer to read in English, but right from the start the world outside the front door has been in German for my children - the children in the playground, the baby and toddler's groups, the music group, the toddler gymnastics, the football club they each joined at age 4 and all still train with twice a week plus matches now (my eldest plays on the adult women's team now). Preschool was then obviously also in German but by the time they started they were fluent anyway, because I'd taken them to every possible local group and essentially lived in the neighborhood playground with them.
My eldest was the first "foreign" child at her kindergarten and her teacher told me at her 6 weeks in parents meeting that she'd been nervous about this but that DD actually had a better German vocabulary than most of the monolingual German children the same age, and was easier to understand than the children from dialect speaking families.
It's very possible to bring children up bilingually without speaking the community language to your child yourself as a non native.
I do appreciate that this is far harder for the OP as she says everyone speaks English where she lives - this is not the case in the farming community I accidentally landed in so although my first years here were extremely hard, I also had no real choice as neither my children nor I are naturally reclusive 🤣
It's really important to give a non native speaking child a fighting chance by immersing him or her in the local language pretty much every time they are outside the house IMO, not rely on them to pick it up just at school when everything else is in English in their lives. Parents who don't make the effort to expose them continually to the community language outside school extensively every single day are really doing them a disservice and making their school life much harder.