Niche – hope I am getting closer!

I am aware that as a life coach I can choose not to have a niche in the beginning. Perhaps I need to put myself out there first and test the waters. However, what does testing the waters look like? Do I just call myself a life coach and help women in any area until I figure it out? I also started brainstorming on what lights me up in terms of how I can help women with and this is what I came up with so far: (1) Help women from ages 30 – 45 with building self-confidence in the workplace, (2) Help women from ages 30 – 45 that lead busy lives to tap and harness their creativity to add more fulfillment in their lives. I was really finding it a challenge to narrow my niche because I am multi-passionate. Your guidance and feedback is much appreciated, Thank you!