If you've already covered the Lydian Mode and want to get into something a little more challenging the augmented version is a good follow up.
This scale requires you to be able to stretch your fingers and I would personally consider it an advanced mode. Though I wouldn't want that to discourage you from learning it. Just take things slow, particularly with the stretches on the fourth and first strings.
As usual, this scale is given in the key of C.
You'll need to start this mode very slowly and intentionally map out your plan of attack for the five and six fret jumps on the fourth and first strings. Once you do that, just move through it methodically and memorize the sound and pattern. At the end of the day, you want to be able to identify it by the sound as much as the chart.
Ascending Melodic Minor
Descending Melodic Minor