Look example tuts on https://www.geeksforgeeks.org/c-sharp-tutorial/

Make a weekly progress on at least 5-7 points on the list, take example Fundamentals, contain Hello World! Program Identifiers Keywords Variables Literals Data Types Operators Enumeration

Make it done in one weeks, and try to make a simple project in the ends, based on the things you already learn.

It will help.

Then Collections

ArrayList
Hashtable
Stack
Queue

One weeks.

After that you can try linq I guess? Or follow the list thoroughly…