Visit some Garden Centres near you- often they’ll have seed mixes of local perennial flowers available for purchase, you just need to spread the seeds in the spring or autumn.

Also, “weeds” aren’t always weeds, they’re just plants that some people decided get in the way of monocultures. If it’s flowering, it’s feeding insects, so leave it be.

The fireflies are awesome in my area this summer and my humble yard is part of that. It’s honestly so satisfying watching plants come back year after year, bigger and bigger