boolean not working properly I have 1 Sphere and 1 Cylinder. I try to join them by boolean. when I Join the cylinder with Sphere, Cylinder behaves weird while sculpting however Sphere seems to be normal. There seems to be some issue of either Clean mesh or Normals. But not  sure how to fix that in Blender 2.8. Please help
Just to illustrate batFINGER's point:

Delete faces with Delete > Faces.
Select an edge loop and extrude downwards.



To close the bottom, just Fill and Poke faces.