Look at the Laws of UX https://lawsofux.com/en/ , its great information for what you trying to do. Source: almost 2 years ago

Similar to Growth's psychology section, here's another great set of principles to learn and keep in your back pocket: Https://lawsofux.com/en/. Source: almost 2 years ago

Have a look through Laws of UX. Although I couldn’t find one for your situation quickly scanning the list, it’s a good resource for when you need to derive decisions from principles/“laws”. Source: almost 2 years ago

With UIDs, I find them to be primarily aesthically minded - they have some knowledge of the laws of UX a lot of the time by accident through the virtue of applying design best practice, they usually display strong brand awareness, understand the importance of cohesive visual design across the whole platform but are equally comfortable deep diving into the low level detail and know the technical limitations of the... Source: almost 2 years ago

Study Basic Knowledge: Laws of UX, Usability Heuristics. Source: almost 2 years ago

Here is my product: https://matchkraft.com/. It is a marketing toolkit. I think you need to ask for feedback, asking why users don't want to pay for a premium subscription. So far, you are getting new users that is a good sign you are going to the right direction. Maybe, who is your ideal customer or maybe your product is ok but need more visibility (maybe paying ads). Try to get active users. I really want to... Source: about 1 year ago

Calling a 3rd party API: There is a complete ecosystem providing "google-sheets-as-DB". I personally tested and recommend https://sheetson.com/ but there are a lot more with free tiers https://sheetsu.com/ https://sheety.co/. Source: about 2 years ago