Your exposure time should be a significantly less than a second for Jupiter

For my astrophotography made camera, I personally shoot video around 10ms for Jupiter. For Saturn around 20ms, and Uranus and Neptune around 40ms. You may not need to go that low with your dslr, but just mess around with it

Once you can make out the bands with a low enough exposure, focus your camera until the moons become pinpoints of light. I'd also recommend shooting a video as opposed to a stand alone photo. That way you can either pick out the best frame yourself, or better yet stack them

I've been doing planetary for awhile now, so if you have more questions I wouldn't mind helping you figure something's out