Shooting the moon with a SX530 HS

My 2 cents... Are you having trouble with exposure or focus? If focus you can focus on the edge of the moon if using AF so there is some contrast for it to get a fix or just use manual focus at infinity. Make sure your camera is set so that it does not continuously try to focus. You want to get the focus and then not focus again. I'm not familiar with sx530 so check owner's manual if you don't know how to do that.  I find manual focus the easiest.

As far as exposure others have recommended some methods that will work and I would add that I have the best luck shooting in M mode and then just adjust your shutter speed until you get the exposure you want. Aperture will probably be already set as you will be zoomed in all the way (just use lowest aperture number it will let you choose at 1200mm equivalent, f.e. f/6.3 or whatever).

Make sure to use a long delay on your self timer so as to avoid the vibrations, etc. in the camera/tripod. Try not to walk around (ground vibrations) while it is settling down in the time between when you press the trigger and when it takes the shot. Hanging some weight on the bottom of your tripod may help also but isn't needed if it's a heavy tripod probably. Avoid shooting on a windy night if possible.

Also keep in mind that atmospheric distortion is the biggest enemy you are dealing with. Shooting on a night after a hot day may give you blurrier results than if you shoot on a cool early morning f.e.

Lastly shoot the moon when it is half full (or at least 1/4 or 3/4) vs. full. You will get a lot more contrast and clarity that way as the sun's rays are going across the moon's surface (just like golden hours here on earth).

Also just an FYI you can also shoot Jupiter and Saturn with your 1200mm camera. Start with moon first as those are harder to get though. For planets, the exposure should be more like 1/25 vs. as others said above the moon is a very bright object an completely different exposure wise.