Feeling overwhelmed…

This is my first sysadmin job and for the last 6 months (my first 6 months) I have been feeling extremely overwhelmed. I am the only IT person here and I am responsible for everything! Im fortunate to have landed such a great job but it is very difficult for me to focus on one thing at a time. Im getting my BA in Information Systems Security but at the same time I actually enjoy working with people and helping them.

As a budding sysadmin, how can I make my days more productive as an admin but still be available as the sole support role?