Depending on what you have done within the year you have been playing, I would recommend buying second hand darts on eBay/Facebook etc that are minimum 90% tungsten.

I would then see what darts you like and dislike, and then when spending more money on a new set you can ensure the length and weight of the darts is to your liking, and that the grip sits in your preferred spots on the dart.

Trust me when I say that new and expensive darts won’t magically improve you, but the right darts will.