All depends.

If you are working in call centre or F&B/ retail, of course you get to knock off on time. Same for some govt admin jobs. I used to see some actually went toilet/ walk around 30 min before official end time.

If you working as executive/ managerial roles, of course your workload is much heavier. My advice is that you try to go back early when you just started work. Because once you get to learn and hand on the role, you have no more excuse to off work on time daily. You surely can off work punctually at times, but please, make sure you really have cleared all the stuffs and able to meet the timeline.

In office, there are only colleagues. There is no genuine friendship, especially your boss/ direct superiors. So, count yourself lucky if you have good colleagues that are kind enough to assist you in work, allow you to enjoy the working environment.

Congrats on your new job. Build up your positive working attitude and everything will go your way.