@NatalyaD
Yeah my intuition from what you've said is that even if it's logistically tricky to give them stuff before they arrive, that's also the point of highest leverage, because of getting people off to a good start. Like "get in before anything's gone wrong and multiplied the anxiety"!
A couple of other things that occur to me now:
1. Buddy systems - does that exist? perhaps involving students from the year above as hosts of small meetups in the first week, or saying hello online beforehand? If it weren't too much of a time investment, you could make a quiz about what they're into (distinct from their course, things like music or Pokemon or fandom) and assemble groups of 3 or 4 newbies based on that? Then they've potentially got someone to walk in to lectures with, which is much less daunting than having to turn up by yourself. And anything linking the previous year's students gives them another avenue for getting advice/info.
2. Caitlin whom I currently work with had a past project at Liverpool John Moores where students started the first year with a module identifying things like what learning styles came natural to them & what environment they needed to be successful, and it worked really well. To copy that full-on would need more buy-in from tutors than you can probably get, but I wonder if there might be elements you could nab. I could ask Caitlin where's a good write-up of what they did. (I know I've seen a video about this project, can't find it now.)
@t54r4n1