In terms of what creators want, in one example, where they'd accept recuring donations, they'd most likely want to see each individual subscription they have / by whole (npub and/or LN address) to say thanks to / include them in credits in a post or video.

In another example, where a creator wants the same as above, to also know what package they've subscribed to, so that they'd know what to provide them with what value/benefit (ex: have a conversation with them, or sending them a specific file, etc)

A third / more advanced example, for service-like behavior (this would be me in this case), would be similar to the above, where the npub data is auto extract/read by the client so that it can give it special benefits (client visual representations, access to certain pages, giving discount codes for merch, access to specific features, inviting to be part of a specific chat group, etc)

Creator gist:
A UI to showcase who subscribed to you, and methods of extracting/reading that data.

Aside from that:
Payment/Subscription(auto recuring payments) based on fiat pricing (Ex: $10 per month. Payment would be 16k sats for the first payment, then the next autopayment would be another $10 at more or less than 16k sats depending on its price at the time of invoice/payment). 

 Thank you for taking the time to provide such comprehensive and useful answers. 

If I understand correctly, it should be something like this preview page, but with some modifications, such as multiple picture uploads for showcasing, markdown support for descriptions, and multiple subscription options, simple login. 🤔

It should include proper and elaborate feedback, perhaps through Nostr DM,  optional email.

And dark mode, of course
https://i.imgur.com/Gdcdgeh.jpeg 

 Yea pretty much. There's an example service out there with LN and NWC for subscriptions, called Flash, though unfortunately it has a lot of steps to get a payment going, and they're the middle-man with a fee you're trying to get rid of, but it should serve to help as a reference for what you're building. Here's an example subscription page I made for testing purposes a few days ago: https://app.paywithflash.com/subscription-page?flashId=676

(Make your own and see how they're doing it. I'd say there's definitely a lot to improve with their UX / user-journey flow).

Aside from that, you could also look at how traditional sites do things (a popular one being Patreon, I like SubscribeStar from what I remember, and a bunch of people use ko-fi).

(side note: if you'd like, since it would potentially end up with me benefiting from it as well, I'd be more than happy to help with design/ux/user-flows, if you're wanting and willing to accept the help/contribution and talk it over, this or other aspects of it as well). 

 Once I have the core functionalities implemented, I will send you a development version URL so you can monitor improvements in real time. I will also be open-sourcing the code, making it one-click self-hostable, And easy to modify.  

 Sounds good! Looking forward to it =3 

 It might take some time, I'll start by rolling out the paywall feature, and then I'll speedily work on adding support for physical items and subscriptions.