I'm on Day 1 and this game hasn't bothered to tell me how to do an SQL injection for getting a password. Like "just go do it!"

I can't figure out how to provide the root digits to access the locked sector in the last node of the tutorial on the ether net map. I haven't moved on because I'm not sure if it'll be important later. The walkthrough assumes I can get through the tutorial. This kind of thing happens to me a lot. I like puzzle games, but I'm definitely not a natural....

I feel like an idiot because it should be something very simple, but how do I make the grappling hook? I have the hook and the rope, the guide just says I have to combine them, but how? The terminal won't accept the "combine" command and I've been spending 20 minutes trying several combinations of "use"....

I played Day 1 in the demo, and I seem to have skipped a lot of content, like logging into Concourse, or something about RyME drivers that the Hive members were talking about, so I got stuck trying to find Emily Loru's username when all of the information should be related to something I needed to do in Day 1. Moreover, in Day 4, when I tried setting cookie and going to Yuki's profile, nothing happened at all. When I looked at the in-game walkthrough, it says that the Hive should have more things to say, ...

Hello! Spoilers ahead, just in case: Once you make it through the nodes, and you start to play the new video game. I made it through the levels, got all the upgrades, beat the first boss, and then made it to the 2nd (final?) boss. I took the boss's life meter all the way down, and the boss grows and begins to attack again. At that moment, I wasn't able to move anymore. WASD stopped working, and I was only able to jump. After that happened, I closed the game and re-opened it - WASD was work...