First of all, are you looking for a complete perfume here or just a ‘woody base’? If it’s just a base accord, you already have a good start on that. It doesn’t necessarily have to smell wonderful at this stage, as there is plenty more to add to a base accord before you have a harmonious and complete perfume anyway. You could brighten up these bases with some complex resins perhaps, such as benzoin, frankincense or styrax, or some vanilla would give it some roundness.
If all you are working with is just what you have in the little kits, it may not be enough to make a satisfactory perfume. I believe it is more for experimenting and becoming familiar with the scent molecules and learning about accords, than for making a complete product.
If you are looking to enhance what you already have here, I would suggest adding more layers of complexity with mid and high notes, with things like Clary sage, Atlas or Himalayan Cedarwood, Juniper, Marjoram, Rose, Geranium, Lavender, Bergamot, Lime, etc, etc. If you use some essential oils, you will give yourself some real shortcuts to complexity that takes a great deal more materials than you probably have if using mostly synthetics.