The folowing skills i woud call basic skills everyone schoud have access to very easy
Basic tool crafting
Stone and metal tools are basic needed to harvest materials
House building at least until Wood tier or until stone
Foundation Wall (door ) Ceiling unlocks at the general tree that you can build a hutt
Everyting else at construktion Except gates fences Who unlocks at beastmaster
Last but not least
Riding an animal schoud not be tied to a skill if a sadle is equiped everyone schoud be able to ride it or unlocked by 1 skill in the general tree
Eventually taming tier 1 or maybe tier 2 unlocked also at general tree but at a cost of 8 skill points total