Edit: this is a not a simple death-march question, because it involves newcomers to an organization and on-boarding. There is an urgent project involved and there is a question about frank feedback, but the project has not yet reached burn-out, overtime, undisciplined software engineering and other characteristics of a death-march.
I recently joined a large enterprise as a senior software developer (I know that readers may not be software devs, so I've not mentioned much tech below). In the interview, I was well-spoken and confident. However, I can get quite anxious if not given the "on-boarding experience" that I would give to others.
(By that, I mean that I would expect a senior dev to know tools of the trade, but not the specifics of the organization. I would pair a newcomer with a designated mentor for a few days, and spend a few hours at a whiteboard for an intro Q&A session. Perhaps this verges on "hand holding" but I argue that it is simply compassionate.)
My first week was last week. Everyone is busy for a deadline. There is no mentor, no Q&A. I was given a document to setup software tools. There are snags, and I'm stuck. I have found other devs and have asked them via email. They are friendly but do not offer to come to my desk and help me for a few minutes. I'm getting quite anxious and nervous, to the point of losing sleep and going into work super-early to atone.
On day 4, I was assigned to a new project that has an "aggressive schedule". The small team of developers are all new. I asked for an experienced contact (for questions) and was told there are no resources available. The dept director also said "let me know ASAP if this project starts to go off the rails". My inner voice noted that it is already off the rails. However, I stayed positive and said we would try our best. But I feel sick. (I had explicitly asked in the interview if the team was open to people asking questions, as I know I need that environment to thrive.)
Do I mention my concerns to my manager, ASAP? Is it professional to state concern for (a) the project schedule (b) my productivity? Is it reasonable for a senior member of a team to have a mentor/contact for the practices of the organization? (I'm assuming I can't disclose my anxiety and freak-out factor, or that I could use some initial hand-holding).