How to get more signups

Somehow our signup growth is harder to get than expected! Do you have any tips and tricks to increase the signup growth and find the right users?

To get a better picture of our website: https://travelwell.io

We are currently using "normal" SEO, Pinterest (with right now more than 8k impressions: @travelwellio) and instagram (@travelwell_us). What else are you using? How did it affect your business?

Thank you in advance :)