Good luck and well done.
Here is what I do in any new job.
When I am new and people are telling me the job I make notes. Ideally I do it straight into an electronic device, but if you just have a note pad and pen I would write everything down. Then I would either keep all notes safe in a file together or if you can do it on electronic device, keep the electric notes in one file together, as it is easier to search if you are looking for some specific things. Some places may not want you to write down passwords or some confidential information, so hopefully they can tell you this or it will be fairly obvious - of people are saying stuff that is not official work information (e.g. gossip!)
I usually make a note of people's names if I need to, and who does what of this may be on the company website.
Ask if you do not understand or feel confused. No one minds the new person asking questions.
If you are allowed coffee breaks etc take the time to chat to colleagues, it should be clear soon (or you can ask) what is expected, do the staff have a chance to chat etc so you can feel more connected to work colleagues or do they drink coffee at their desks and not interact except at lunch times.
Share stuff about you appropriately! By this I mean do not tell everyone everything very early on. Once told people cannot be untold. So you may choose to share some things as you go along but try not overwhelm people with too much personal information. I am sure I have met people who tell you about their latest operation or whatever the first time they meet! I am sure you will not do this! I had a lot of fertility treatment while at work and choose not to make it public knowledge. You do not owe your new colleagues to tell them all about you.
Be open to making a few friends. One of my closest friends now is someone I worked with about 17 years ago and I still spend holidays with people I worked with over 20 years ago. This is not, of course, the purpose of work, but sometimes you find someone special who you get on with and just click, so if you are invited to go out or socialise or simply drink coffee with colleagues, do be open to the fact you may make some new friends.
Prepare for success the next day (THIS is the bit I often fail to do!)... -Get your work clothes out ready, make sure they are clean and ironed etc. check you've got the shoes you need etc (unlike me today with dd's friend's party where all her shoes were caked with mud!!).
-If you need to bring in any items for work get them ready the night before, packed in a bag, ready to go.
-If you need to take a packed lunch (often much cheaper than buying even in a subsidised work canteen) make sure you make it the night before. (I do love having lunch in work canteen sometimes, as a treat, it's very sociable and I do it when the food is really what I like, the menu is available advance on our Intranet so I could prepare if I wanted to).
Go to bed early enough to get up early enough to get to work. Bear in mind stuff like transport issues, when I worked in a big city and used public transport it was train issues, now it is traffic ones, sometimes you can know in advance there will be issues but often not. So allow enough time to get there and maybe sit and relax a bit before you start if you are early. Remember this is the stuff I fail to do, so sadly I am saying what I would like to do if I could.
Good luck and congratulations.