Other than SSD 1 and AT level 1, what other online training can you do to get ahead?

SPC (Join to see) while it is way above anything that you would do at your rank their are courses you can get promotion points for such as the Additional Duty Safety Officer and the Commander's Safety Course. Last I checked they were 8 hr and 16 hr courses. If you ever want to be E7 or commission you will have to do the CSC.

You can also try online college courses to get some points there as well and look well rounded with both Army and college courses.

Looks like you are leaning forward. Keep it up.

Cyber awareness, (sign AUP), GAT 2.0, SERE 101.2, just to name a few

Not sure of your status, but if you are Reserve Component, look into EBDL- electronic based distributed learning. They have quite a few courses available (many mandatory, to include SSD) and you can get paid to complete it. Your unit should be able to provide you with a list of classes and process your for pay as well.