Look at the following picture and check if you are holding your guitar in the correct position. If you do not have a footstool, some phone books stacked on top of each other will do until you can use a footstool.
This position might be uncomfortable for a little while. While you’re getting used to the position, remember the following things:
A music stand is also recommended, but a high table or desk or paper stand can be used as a substitute at first if necessary.