Amigo @s.iwasaki buenas, this is the workflow that you need, firts i advice you to decide if you want to use solid by loft or solid by swep they work diferently i prefer solid by loft because give me more control about the transversal section, they can be diferent or rotate along the axis, this is what i do, i use Curve.Plane at parameter to create normal planes along the curve, this allow me make a soft solid, then i draw the section arround those planes, easy as that, then i just use solid by loft.
The history with the family type and family instance is diferent in 2023 they are default nodes, in previous version you can use spring nodes use the node family isntance by geometry, to create the family type you have to be very specific with the categorie, the family template path and the material, i let you an example. beware because you are only creating the family type definition not an instance, to create family instance use family instance by point, or family instance by point and level as you wish.
I let you my acount number in private message!!
