Workflow of a Solo App Dev

I researched some workflow for a solo full-stack developer, and I found that people have different approaches to it. This is how I'm doing it:

1. After going through the initial idea validation process. I listed brief information about the app:

• Target market demographic (So that I know the UI/UX style that I need)
• essential feature & additional feature
• Architecture (I usually started with a monolithic architecture, then move on to microservices when I need and am ready to scale - I'm building SaaS products).

2. Ideally I would create the UI through Figma or hire a designer to do it.

3. afterward, I would start with the FE and then continue to the BE. I would especially start with FE if I don't have the UI design model prior to building (means everytime 😂) so that I know how should I create the schema model for the database.

What does your process look like?