I just brought a new house, I can't tell between weeds or flower?

If its pretty keep it.

Flower will have a shape to their leaves

There are several apps that will identify plants from a photo. I haven't used it, but it may be helpful. Sometimes I just let something grow until I can figure out if it is a weed or not. You probably don't want to do that with an entire garden tough.

Does the town your located in have a gardening club? They would

probably be able to help you.

Make friends with your neighbors especially ones with Gardens. Most likely they will be glad to help you identify and may even know what's in your yard. Being a Master Gardener, we find most people are willing to share their gardening knowledge and information and FYI all leaves, even weeds have shapes! LOL Good luck, Wally