Once I’ve created a solid result, can I export it to OBJ
In first beta version it is not possible to export in OBJ. However, it is possible to export the model in GLTF (and GLB). This format contains information about geometry and materials, and it is supported by a large number of 3D viewers/editors. To export your model just click in the toolbar “File > Save as” and change the format to *.glb from the save dialog.