That is very common to have an induction day or course at the beginning.

在刚开始的时候，有入职培训或入职讲解都是很常见的。

I could say, I had an induction day when my manager explained how things work in more detail and took me around the office to introduce to my colleagues.

我可以说，我那天有一个入职培训，当时我的经理更详细地解释了工作流程，并带我在办公室里参观，把我介绍给同事们。