Does it make sense for me to sell frontend templates/libraries?

Question

Frontend

Good afternoon friends!

Goal:
Sell complex frontend templates/libraries. I'm not chasing big money, I want to do what I love)
You, frontend engineers, are my potential clients.
For non-technical clients, I'm of the opinion that it's more difficult because more need to think about applying the pattern to the business.
Questions:

1. Did not work as a security specialist (Application Security Engineer, or similar). If the product is like this, is it OK, or does it make sense to say: everything is done except for safety? The question is related to a misunderstanding of how it generally happens about the security of a project in industrial development.
   
2. Interested in whether there will be a need for my products.
   

Who am I:

1. Front end engineer;
   
2. Worked on Scrum / Agile for a short time, but read about and is ready to apply Extreme programming and Agile;
   
3. I know Software design, TDD, BDD;
   
4. DDD theory, applied its principles when learning requirements;
   
5. I will go through topics regarding the frontend https://portswigger.net/web-security and https://web.dev/secure/ ;
   
6. I know how to design API;
   
7. I will be a UI designer
   

Important:

1. 3 years experience in development. Did not participate in open-source. There are freelance reviews in long-term projects like junior. I didn’t work much in companies as a middle man (because I’m bad at estimating deadlines and not fast). Otherwise noname
   

Product quality level:

1. Security, by one's own efforts;
   
2. High-quality GIT log;
   
3. Documentation on https://diataxis.fr/ eg https://www.gatsbyjs.com/docs/quick-start/ ;
   
4. Semantic versioning;
   
5. High-quality, thoroughly tested code;
   
6. continuous delivery
   
7. web accessibility;
   
8. Frontend performance;
   
9. Well thought out, not copied, UI design (Without UX: research, etc.)
   
10. web vitals
    

Competitive advantage:
I think a well-made product that is not yet available in Open Source and for sale.

Examples:
I was thinking, for example, about a gif table in the form of a library, with a flexible API, but with minimal loss of maintainability. To be able to modify its code itself.
Or this:

In general, release the developer from part of the work.

Answer 1

well, try https://habr.com/ru/post/278999/ , here the web studio, as I understand it, took more than a year to make a template for sale. They also thought that they knew everything and were able to
do it in general. This is a good passive income, but never a simple one
, and by the way, your description in the Who am I section, as if it were some kind of June. I don’t know what you have in reality, but with such a resume you can’t get a job higher than jun +

Answer 2

No