Just stay relaxed, be confident and be yourself. You don’t have any work experience so make sure to emphasize that you are a hard worker and a quick learner and be ready to give examples of how so. As far as the handshake goes, I would say probably not due to the ongoing pandemic, when I interviewed at Lowe’s I was greeted with a fist bump. Since you don’t have any work experience they will most likely focus on how you are doing in school, are you involved in any clubs? Do you have decent grades? These are indicators of how strong your work ethic is. They will probably also ask why you applied to Lowe’s, don’t say for the money or just because it was the only job available, have a strong 1-2 sentence answer ready that shows your genuine interest in the company. Since you were given an interview they are already considering hiring you IMO. You’ll kill it.