[raymo]

You can't use "Live View" to focus on the milky way; in a wide field the
stars are too small[and therefore too dim] to register on the screen. It
only works with fairly bright stars.
This Jupiter is still over exposed, 5 secs is much too long. ISO 3200 is
noisy and unnecessary, as Jupiter is bright. I suggest using 800 and start
with around 1/10th sec. Enlarge the resulting image to maximum on your
LCD screen, examine it, and shorten or lengthen your exposure as necessary
for each ensuing attempt until you get it right. Have you not got a lens
longer than 50mm?
raymo