Hi ratgirl34,
You have to hold right click first to knock an arrow, then while still holding right click hold left click to draw the arrow. The longer you draw back the arrow the farther it will fly when you release left click. If you eat a blue cap mushroom your arrows will become illuminated when you fire them for a limited time so you can more easily judge their trajectory. You can toggle this with a hotkey found in the options.
Locking the building pieces and prebuilt huts will be added in the future.
There will also be farming. Resources do not respawn as of now.
Thanks for testing Windstone.
Edit. You also do not have to wait for the knock arrow animation to complete before drawing back. You can start pressing left click as soon as you hold right click to quickly knock and draw back the arrow. You can rapid fire very quickly at short range this way if you left go of left click as soon as you start drawing back. Takes a bit to get used to but the dynamics of the bow are supposed to have variation: Fire far at a slow rate or near at a fast rate or anywhere in between.