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You could maybe bodge a little "softbox" yourself with some strong card & tracing paper in front of the lamp(s), or look for the little softboxes photographers use for their flashes etc.
Lights in general should be level with your head if possible - and if you have two point them so they're coming 45° from both sides.
Or have one strong light shine at the wall in front of you, reflecting back at you.
Obviously this depends a lot on whether your space allows for it but I'd try to use natural light as much as possible (move your face closer to a window) and / or use "soft" light sources.
If there's a light coming down from the ceiling (like when you're working from your dinner table) you might consider getting a bright / ideally dimmable bulb and put it inside one of these paper lantern spheres. Great light for not much money.