Timelapse from sunset to startrail

So I´m new to Insta.

I´d like to shoot a Hyperlapse that starts at the sunset and go deep into the night with Stars.

I´ve tried Automatic mode (ISO priority) but shutterspeed do not go more than 1.5 sec exposure.

Is there any tip to go beyond 1.5 sec ? (maybe 8 to 10 secs) ? So I could automatically register the Timelapse ?

Any tip on that ?

Best regards.