I am an expert BS-er, and you might be also. It could be that you are partially doing a good job, and partially winging it, or BS-ing your way through. If you haven't been reprimanded much, that means you probably are at least adequate. It might not last forever, so i would just make the best of it. If anyone you see there looks cute, flirt with them, basically anything to pass the time. I think a ton of people at jobs are not doing much, or doing the bare minimum, so I wouldn't beat yourself up. It isn't your fault it is not a structured environment with someone working with you directing you properly.
The world and work force is so broken in a way, that people like you, in your same situation, could possibly even get promoted, despite not doing their best or working well with people who give clear instructions of what to do. If you can BS your way this far, as miserable as it sounds, you could BS your way to even an upgrade of the position you have. So much of life and work and dating is BS-ing or just going with the flow. If you believe or convince yourself and others that you are doing well, then most likely people will buy into it. It does not sound like a good long-term situation because you have no clear direction and everything is scattered, but all I can say is it could be a lot worse. I work from home for many years, but all i did was make enemies in every job I had back then where I had to work with people. If you aren't at war with everyone, which i was, it could be worse