I’d remove all the doors, repair holes, maybe a few of the shelves, and repaint.

Maybe add crown too.

A good paint job will bring it up to date.

What is your office furniture going to look like?

If it was my office I do White, It will keep the room looking bigger & brighter

Due to the assymetry, All white or a very hint of light grey

I would choose a color pallete for the whole room before choosing. Choose colors that inspire your best office work. You can also do all white built-in then decorate with pops of color decor.

Changing the knobs would really dress it up, too.