Sketchup doesn’t have the native ability to joint a figure.
You either need to find a figure that suits your application, adapt one or model it yourself.
Any pointers you can give if i were to model my own? I’m not very experienced in Sketchup. Been using it a while now but only to model simple vehicular shapes.
The matter is to use right keywords to find what You need. I think the best keywords for this kind of model are “poseable figure”, “ergonomics”, “Mannequin”, etc.
I never encountered any difficulty repositioning figurative models using SU’s native tools, especially if they are on the low-poly side. Using the Rotate tool fold along angle of rotation feature was something I frequently used to reposition the figurative models I made and display throughout that website.