Confused after wasting 1k€+ on ads

We are selling premium Electrolyte Gummies. Turned out our customer base is way older than we expected. Around 40-65. That’s what we see from the online orders and the offline events we attended. Feedback is awesome but sales online are shitty. Most of them we get through recommendations and codes from offline events.

Instagram: Spend around 900€ and tested around 10 creatives. With 30€ per day for a few weeks. Only 3 sales but a lot of clicks. Optimised the website and started with a narrower audience on Facebook only. 40-55 and 55-65+ but after another 150€ we do get some add to carts but no sales. Where we live PayPal is quite popular and we are experiencing problems with it therefore it’s deactivated as a payment option. Might this be the reason for less sales? Or is 55-65+ the issue? All atc on one creative but maybe we need to set the age to 64. We also listed specific interested for both groups like cycling, hiking,…

Any feedback and help would be greatly appreciated. I’m thinking of quitting meta and just do offline events since we do most sales there.