Hello and Welcome To BYC! Sorry for your losses. TwoCrows has given you some good advice. There is a nice article in the Learning Center on adding to your flock. https://www.backyardchickens.com/a/adding-to-your-flock If you are starting with adult birds, usually you want to keep the new and old birds separated for awhile to get them used to each other, so It will take a while to integrate the flock, usually at least a month, and longer if you have to do a health quarantine. As soon as you can get the coop/run reinforced, and have a place to keep the newbies, no reason not to get new birds.