What are your results flyering door to door?

In your experience does dropping flyers (using matte paper made and bought from canva) into doors provide good outcomes? I work 9-5 as a gastro dietitian but plan on going through certain streets after work to drop these flyers off to around 50-100 houses until I've cleared the area

I have an online dietetic practice that supports people with gastro issues (IBS, IBD, diarrhea, bloating and disorded eating)

I want to ask if this is a good idea to explode my growth. Growth and getting more leads even if I break even is more important at this stage

So:

50 minute initial call + 30 minute followup package is £179

My flyer will include my website landing page: https://www.bingedietitian.com/services/

And I'll offer people a coupon code in the flyer of 80% off and 100% refund guarantee if I don't resolve your problem

Also if they refer 2 people to book to me. Email me and I'll send you a massive £50 as a thank you

I know this will get people talking in their homes but is there any suggestions to make this offer EVEN more appealing? I've read 100m offers and implemented it as much as possible

Thanks