The surge in popularity of astrology helps a great deal if identifying your core purpose. I am a Gemini. I communicate. There is much more you than your sun sign, but it is a great way to start identifying your Unofficial Reality.
There are excellent resources online to help you understand more about your stars. Nothing is perfect, but if you read a few versions of your sun sign you’ll soon get the drift.
Just because your sun sign might say you’re a family person, mothering and loving (Cancer), it isn’t literal. You do not have to have a family. Many Cancers make their own families unofficially with friends from all aspects of life.
Think broadly to find how you fit your sun sign.