While tutorials online can get you started quite well, the most important part is passion. This is advice I give to anyone learning any programming language (or really just about anything else), because it is always the same.

• Start off by learning the basics from a teacher or a good tutorial (for example the C Primer (aka The Bible) or Udemy). I recommend text-based explanations, though videos can be used in addition later on, once basic stuff has been understood.
• Once you got the basics, start working on a small project of your choice. Think of something you might need in your every-day life. Maybe a program which starts other programs in a certain order? Maybe a little note-taking application? A text-based console game? Doesn't matter. All you have to do is think about how fun and cool it will be to have it, use it and show it to others. Best of all, you can extend it as you go. Add functionality, like music playing in the background, a form to input stuff, and so on and so on.
• Learn more stuff which you need for your application. Be selfish.
• By now, you have fun programming and you will probably learn more and more over years to come, driven by your love for your creations :)

Initially, you might find it hard to understand all that stuff which is going on. It might seem hard to come up with the logic and sometimes you might sit there puzzled, thinking why the darn thing does not do what you want it to do... or why it keeps crashing. But you will learn that even those moments and challenges are a fun part of programming. Just... keep going, since they will be especially annoying in the beginning.

Oh, and PLEASE, if you cannot solve a problem after sitting there for hours or days, feel free to post a question here in the C node (you may invite me, if you want). You might find a solution by just explaining the problem and your code; and if not: I really miss system languages on Hashnode. Please help getting them more active by contributing questions to the C node :)

Practice. Mike Acton from Insomniac games brought this up during a talk at a conference. Get in the habit of opening up an editor, writing a linked-list, hashtable, or some other small program, then 30 minutes later, close the file without saving.

Do it again the next day, and again, and again, and again.. Then move onto another small program... Keep doing this. Acton stated that many programmers forget that you can actually practice coding like a musical instrument in a repetitive and methodical fashion. This single realization has done wonders for me in retention of skills.

Learn from here - C programming online from the best C tutorials submitted and voted by the programming community.