To repair the well (if it provides high quality water), get some stones in your inventory and select Adventure: Repair, then click on the well. If the well does not provide high quality water, build one of your own in a more useful place.
If you are using a QWERTY keyboard, the 'comma' and 'full stop'/'period' keys are just to the right of the 'm' key. Full instructions for their use are provided on many helpful websites, such as
this one. If you are not using a QWERTY keyboard, or if you do not have punctuation in your native language, you may need to seek further advice from someone more familiar with the specifics of your situation.