There is one thing guaranteed to happen to you in such a scenario: You will get fired.
I recall getting my first job in 1982. I was so excited about it that I did not realize I had health insurance. Until the new year came and I “received” my new card. We were growing so fast that our orientation system had not been instituted yet. You should have seen my face years later when I left the company and received a lump sum payout for my “pension.” (Not a 401k)
Orientation is a nice thing. They were not so hot on it in 1982. There were several things I did not know about. I never asked because I was, as I wrote, so damned happy to get a job.
Something similar happened to me later in the 80s. When I left the company, I had them invest my small pension value in a fixed fund at a then-low rate of 4%. Now that’s a really good rate!