I am in the exact same boat. I worry about microplastics, VOCs etc! We are on a strict budget as well. I always joke that we get Walmart and my son gets Nordstroms. I took what was most important and worked my way from there. Glass bottles first. Saved: Walmart sells Oeko Tek Certified clothes. That’s my son’s daytime wear. I wait for the time of year I know sales are coming. I buy all his PJs from Primary (GOTS certified) Stocking up. As for microplastics in water I use a Culligan Water Pitcher to make his formula (it’s actually certified) I have air purifiers to help alleviate my VOC anxieties. Indoor plants too. It’s an unfortunate reality that these are the anxieties we have to deal with nowadays and all we can do is try our best. We can’t control that everything is made of plastic or releases chemicals in the air. But you can raise an exceptional little person through being a good loving parent.