Is it easy to learn and remember linux's commands?? Plz give me advices

Answer 1

The command line can be daunting for new Linuxusers. Part of that is remembering the multitude of commands available. After all, in order to use the command line effectively, you need to know the commands.
Unfortunately, there’s no getting around the fact that you need to learn the commands, but there are some tools that can help you out when you’re getting started.
https://www.maketecheasier.com/remember-linux-commands/

Answer 2

Here's something you can try, especially if you are learning/practicing programming at the same time.
Use Ctrl-Alt-F4 (or almost any other F-key, try some other ones if F4 doesn't work) to get onto a naked command line. From here do your work as usual using nano as an editor and Linux commands to move around the system, compile etc.
After you get used to this read up on some other command line programs (like grep, ed, vim etc.) and try to incorporate them into your work flow.
When you want to automate a task, instead of using a language like Python or Perl, use a shell script.