Question

1. How can I creat folders in my homedirectory?(by using mkdir? touch?)
and how can I check files in my homedirectory by using ls command?

2. How can I change my current directory to folder? (by using cd)

Answer 1

1. 
mkdir is used to create directories. Where as touch is used to create files.
Command to create folders in my home directory is
mkdir ~/newDir

Command check files in my home directory is 
ls -l

2. 
Command to change my current directory to folder?
cd newDir