I always recommend my students to read the job/position/opportunity ad very well so that they know exactly what kind of candidate they are looking for. Underline the key words used in the ad (especially those that describe the requirements and the desired candidate background) and try to use them in the interview so that you appear as someone they’ve been looking for. Google the most common interview questions and prepare your answers: ideally write them down and then try to include those key words from the ad or their synonyms. Practice saying out loud your answers, pay attention to your posture and body language - they are also very important even if it’s a Skype interview. Best of luck!

I would say practice with a teacher, they will be able to help you prepare :)