It helped me tremendously in college, and I still use it today, both for past knowledge retention, as well as learning some new things. It is an incredible tool.
As far as the learning curve goes, I would recommend this: just use it as is. You can dive down a rabbit hole of optimizing your learning approach and adding the right extensions, but that time is better spent just studying what you want to learn.
Use the Cloze format, keep cards limited to a couple sentences at most, and practice daily for a couple minutes, and you can’t go wrong.
Wars are won by killing the enemy and breaking their stuff. By capturing and controlling land, means of production, supply and transport lines, and so on, you impose your will on your enemy and remove the capability for them to do the same to you.
Drones will be used to destroy enemy assets, take out ground troops, and maintain control of of the above mentioned resources. You’ll never just have one drone army meet another on an open field, that’s not even how human soldiers fight anymore.