Receiving these signs from Hecate herself might be overwhelming. Maybe you sense that she’s trying to get through, but you are not completely sure. That is normal, especially if you have never worked with deities before.
At this point, being open to signs is more effective than actively looking for them. If you suspect that Hekate wants to work with you, taking notes might be useful. Keeping a detailed log of these signs will make them tangible and can help you understand them better. Write down if they are present in dreams or real life. Mention every symbol you notice. If you have a vision, jot down any other elements present. If you are undergoing any kind of change in your life, explain that, too.
Of course, it is difficult to discern what is really a sign. However, this is when faith comes into play. Remember that Hecate works from the inside out. If you have an unexplainable gut feeling, you are most probably correct. Trust her guidance and she will show you the right direction.