Thanks! I am launching Luxembourg's first healthy meal plan service, how can I spread awareness?

Thanks for all your advice on the idea couple of weeks ago, unfortunately I was not allowed to reply to comments at the time. Anyways long story short, I have decided to go ahead with the service since many people expressed interest and I myself need it desperately as someone who struggles with eating healthy consistently. However neither me nor my partner have any experience with marketing so looking for some advice.

What kind of marketing channels work best for Luxembourg? would you suggest traditional stuff like news papers and pamphlets vs paying social media influencers or just running paid ads? and if the last one would you do llinkedin, reddit and tiktok or just stick to insta?

Any personal experiences with running ads and how to optimize them would also be super helpful! We have tried a few paid ads with meta but the results are not great so wondering if we are doing something wrong or it's always like this. What is a good CTR or cost per click?