Hi
@MariaC06, welcome to the forum.
To answer your initial questions, rotating furniture in build mode can be done in 2 ways:
1) Left click the item so the mouse pointer becomes a fist, right click as many times as you need to get it facing the way you want, left click again to set it down.
2)Left click, use , or . to rotate in either direction then left click again.
For items you can move in Live mode (yoga mats, paintings etc), while in Live mode left click and hold to get the fist and use , or . to rotate. You can also move any of these items while in build mode.
To sell an item or place it in Inventory in build mode you need to left click and drag it to the bottom of the screen, where the inventory and sell areas are on the left side.
We also have an active
builders thread here which is the best place for asking any questions you may have about building. We are a really friendly bunch so ask away, there's no such thing as a stupid question.
Have fun, Helen