Hi @BurcuDincer, don't you worry! Rest assured that many have had insecurities along their way in online teaching. I encourage you to share one of your course videos in our monthly feedback thread here for your fellow instructors to share their feedback with you. Practice makes perfect!
About the editing program, there's a great resources compilation in our Best Instructor Posts of All Time — Course Creation with a specific section: How do I edit my course? What software should I use? that I think you may find helpful.
Best of luck!
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