Could you guys help me understand what these skills could be used for?

Hi! First of all, sorry for my english if you'll find something weird; I'm not a native anglophone!

I've just finished an interview with a firm that could potentially offer me a training course with a future insertion in the company (they'll let me know in a couple of days for a positive/negative feedback). I'm currently learning HTML, CSS, and js, I use vscode but the skills that I will face sound new to me (I've never heared about some of them before). I leave you the list here:

• Development environment
• Visual Studio Code
• C#
• Controlling Flow and Converting Types
• Writing, Debugging and Testing Functions
• Building Your Own Types with Object-Oriented Programming
• Implementing Interfaces and Inheriting Classes
• Understanding and Packaging .NET Types
• Working with Common .NET Types
• Working with Files, Streams, and Serialization
• Protecting Your Data and Applications
• Working with Databases Using Entity Framework Core
• Querying and Manipulating Data Using LINQ
• Improving Performance and Scalability Using Multitasking
• Introducing Practical Applications of C# and .NET
• Building Websites Using ASP.NET Core Razor Pages
• Building Websites Using the Model-View-Controller Pattern
• Building Websites Using a Content Management System
• Building and Consuming Web Services
• Building Intelligent Apps Using Machine Learning
• Building Web User Interfaces Using Blazor
• Building Cross-Platform Mobile Apps
• Deep Dive (Azure, Microsoft 365, Dynamics 365, Power Platform)

Given that I know, more or less, the job market with HTML, CSS, js, react, angular, AJAX, and so on, but pretty much nothing about this stuff that I see on the list, my questions are:
-What's the difference between what I'm studying and what I will study if there will be a positive feedback from the firm?
-What could I do with those things that I listed?
-How is the job market regarding the professional profile that you could potentially create with those tools on the list? Is it in demand?

Thank you!

P.s. I'll be posting this message in a few more forum so please don't feel frustrated If you see it another time or don't think I didn't consider your answers! You didn't waste your time, I'm just trying to gather as many informations as possible.