Mobile app business

I’ve come up with a series of articles on business in mobile app.

However, these thoughts hold me back:

I don’t think B2C subscription mobile app it’s a good business idea. I wrote about it here, but maybe it will be useful to someone.
The data quickly becomes outdated. Much of it may no longer be relevant in a year.
3.Now the mobile app w/$200K is not my main project. I am working on a b2b saas product. Takle, messenger for smooth communication between companies.
I made a list of topics and got overwhelmed, and this is just what came to mind initially.

Here’s a rough list of topics:

Choosing a niche and testing ideas
— Choosing a niche
— Games or applications
— How to test on a budget
— Choosing a region
— Localization
— Competitors
— Niche and verticals to avoid
— Niche opportunities for earning
— Local or global application

Development and Team
— Launching a new product
— Team for mobile app development
— Development
— Design
— Outsourcing
— Hiring
— Marketing
— Product owner
— Back office
— Minimum team for startup launch
— Development costs of an application
— Launch and development timelines
— Which platform to choose — Android or iOS?
— Software
— Infrastructure
— Founders

Product
— Metrics
— Finding product-market fit
— Onboarding and activation
— Monetization
— Advertising or subscription
— Unit economics
— Feature prioritization
— Software
— Analytics
— Store reviews
— Localization

Finances
— Metrics and KPIs
— Financial modeling
— Expenses — fixed and variable
— Taxes
— Store commissions
— Legal structure

Users
— Support
— Customer development
— Interviews
— Qualitative and quantitative research
— Store ratings
— Metrics and KPIs

Marketing
— Metrics
— iOS 14.5 attribution and its consequences
— Minimum marketing budget for an app
— ASA
— Google Ads
— Metadata
— ASO
— Agencies
— Affiliate networks
— Content
— Gray hat promotion methods

Selling a mobile app
— When should you sell?
— What’s the current state of the market?
— How to prepare for a sale?
— Prices and coefficients
…

I would like to hear your opinion and support. Should I proceed?