Psychotherapy Google Ads Revamp

I manage a psychotherapy practice that currently spends about €500 each month on Google Ads yet receives almost no calls or enquiries. Over the next six months I want to turn that spend into a steady flow of qualified leads... (Budget: €250 - €350 EUR, Jobs: Content Writing, Copywriting, Digital Marketing, Google Ads, Google Adwords, Google Analytics, Internet Marketing, Keyword Research)