For the first week, I’m making a capsule.
Firstly I drew a tube, then I added a sphere under it.
I trimmed the sphere so that it only has its lower half part.
And I mirrored the sphere so the capsule is created.
Then I grouped everything together.
If I want to move them separately, I can still achieve that.
And I used DuplicateEdge – Join – Loft, to make the hollow capsule cover solid.