Auto focus has nothing to do with shutter speed. If you have a manual exposure mode you may be able to slow it down. If not how about a night mode?

Point and shoots were made to be simple… they weren’t made for artistic shots. I suggest you start saving for a DSLR, or rent one.

If you have an ISO setting adjustment then try to set as low as possible, alternatively you could try and place a ND filter in front of the lens and the lessening of light will slow the shutter down.

take your camera into a dark place and push the button down half way so it sets the shutter speed low then take the picture quickly or just take the picture in a dark place