How to be a good manager?

i’ve just started a job as a manager. i am good at my job and worked really hard to get the promotion. the problem is i am very young. i used to be a people pleaser and do anything, but the people i manager aren’t people pleaser…. it’s so hard sometimes i think i’m really crap. how do you balance making your staff happy and keeping to the organisation’s goals – or can’t you?