Career Advice About Target

I'm looking into a team switch, and I was wondering what I could ask to figure out if the team works for me. My priority is to find a team with good growth opportunities, so I can make the jump to L5 (senior). I know in Taro that it's suggested that you talk to engineers, but talking to engineers has been tricky from my experience with Target's team-switching culture. Questions that I can ask to just the engineering manager would be great!

One of my core goals is to get to L5, which is senior at Target. However, I'm not entirely sure what is necessary to get to that next level - I've tried to get specifics from my manager, but their answers have been relatively vague. I was wondering if anyone could share more concrete attributes of what a strong senior engineer looks like.

I just joined Target at a Principal level. My manager is spread very thin and wants me to take initiatives and has told me to start networking heavily in the first few weeks. My plan is to create an Onboarding doc and share it with my manager. I'm going to use this doc to manage expectations and use it to review together 3 months down the line. How can I structure this doc? What pieces of information are more relevant/vital for such a doc. Any pointers?

I will be moving to a new team soon. Is it recommended to ask for feedback from my old team before moving out.

I have good relationship with my team and I want to leverage them to know more about my overall contribution as a team player and engineer.

What is the best way to do that ? What type of questions I can ask ?

I want to avoid falling into same mistakes and grow faster in my new team.