You can start your journey into Linux tutorials with this Intro to the Linux Command Line video. There are many tutorials so find any series you like on YouTube and watch and learn.
Additionally, there are YouTube videos provided by the what is now ARC-TS here at the University of Michigan. They have a slant towards research computing (HPC clusters) but are still useful for the basics they go through to get you up to speed. Here are two tutorials they have:
What is Linux?