Mondays and Tuesdays are really buisy for you. Don't wait until last minute to have you or your team do time off requests or approve escalated punch corrections on monday mornings.
There a reason you have access to roughly 4,000 reports - you can get any information you need at any time as needed. Look up the search term "HR reports" in eHR+human resources as that calls out the most common ones you will use, the frequency of when each has to be pulled, and information about them.
Don't try to take on everything for the store, all ETL's can promote and transfer team members and send out offers for candidates for example and that is part of their job description also, so unless you want the extra work don't let them just dump that all on you and your staff all the time.
If someone tells you anything (including your HRBP or HRD) that sounds strange or isn't sitting right call HROC to ask about it. HROC in general is your friend don't feel bad calling them often when you are new or run into something you don't handle regularily as that's what they do.
Don't fill out any 3rd party paperwork or employment verifications for anyone at your store current or former. Especially anything from the government or a lawfirm. Depending on the type of document/request it is there an internal team or contracted company that needs to handle it instead. Target is very strict about that and that gets a lot of new HR leaders in trouble.
If you are new to HR a couple things no one likes to talk about: It's hard (as no one goes into HR unless you want to help people) but part of your job is telling people no or giving bad news when you really don't want to. Be direct (yet empathetic) and don't try to give someone the impression you will or can do something you can't. Better to tell them up front so they can figure out their other options instead of delaying things, just rip off that band-aid. Also you and your team may be blamed for decisions other ETL's or your SD make when it comes to things like who gets promoted or who gets what hours or pay, that's part of the job. As someone else told me when I got into HR originally "it's better to have an employee mad at HR in the office than be mad at the leader they have to work with daily".