i meet muy friend Laura at the shopping centre on 7 pm ¿las preposiciones están bien así ?? この表現は自然ですか？

either present tense: I'm MEETING MY friend Laura at the shopping center at 7pm.

Or past tense: I MET my friend Laura...

"shopping center" isn't (in my opinion) something we say much. I hear (southern CA anyway) more commonly..... "THE MALL" (if it's a mall) or THE STRIP MALL (which is a smaller, outdoor shopping center with maybe a grocery store and a bunch of other stores). I just asked my 21-year son what he would say. We agree -- we say the specific store. "I'm meeting at the Vons", "We're meeting at the Jersey Mike's".
I know this isn't what you asked but I wanted to give you additional information.