Pls. House, I need someone who has succeeded in building his/her app/software from scratch to final production. To pls leave his whatsapp contact, for a chat. I really need to chat with someone to provide me guidance.

Have you heard of Bubble or NoCode applications?

You can build web applications by learning to use this platform https://bubble.io/blog/tag/how-to/

I'm assuming you are new to app development. You can also use Adalo to build mobile applications.

YouTube has so many tutorial videos to teach you how and what you need to learn.

Hope this helps!