Good time to clean out or replace the Power Steering Fluid reservoir. The cap in those has a seal (o-ring, I think) that fails to seal after a while, so replacing that too might help.

In general, it would not be surprising if you fix the major OFHG leak you've got, and that allows you to see the other smaller ones.

Don't underestimate the skill, tools, and effort required the first time you remove the fan nut. After you've done it once, you'll know it will be 5x easier the next time.

__________________
2001 X5 3.0i, 203k miles, AT, owned since 2014