I have been playing away using unlearn skill points to try things out.
Item Crafting skill set:
1. Block recipes branch is for compactor.
2. Decorative branch will start with unlocking glass.
3. Prop and Item branches I managed to unlock together and I'm not sure what recipes I acquired belong to which category. Extractor recipes and items like nails and storage blocks/shelves were unlocked through these two.
Equipment Crafting skill set is pretty much straight forward - the only thing that surprised me was the chisel being unlocked through tech branch together with the grapple.
In general dont spend points on Equipment Crafting too soon. These skills are costly and although you'll be able to build machines, you won't have extractor and compactor recipes unlocked until you get to Item Crafting skill set. To get there fast it's better to invest in some atributes and tool mastery to work better and to be able to survive easier while away mining and exploring. Buying skills at cost 5 and 6 only will get allow you to unlock entire Item Craft branch pretty fast. After that you cam simultaneously unlock all the basic skills from all branches.
Among less intuitive things: when you unlock Survival skill-set you will find it useful to learn durability branch as it will lengthen your tools lifespan.
Under Abilities: jumping skills will greatly enhance your exploring options - increasing your jump height to 2 meters through the first skill is enough to open a lot of slopes for you and that will save your grapple for the real killers.