'everything else' in Buddhism is is trying to explain the Four Noble Truths.
the Four Noble Truths in a Nut Shell
1]All life involves suffering. there is the suffering of birth, the suffering of sickness, of death, the suffering of the transcendent nature of things, and the pervasive suffering of existence itself///..living involves unhappiness,dissatisfaction,desire for things to be a certain way or attachment, or to not be the way it is/aversion. fear,jealously, anger, hatred, depression, it is also physical and emotional pain, pain of change,etc Not just humans, but all beings share these sufferings.
2]suffering is caused by Karmic actions contaminated by delusions, and the delusions themselves,desire, anger, aversion, attachment, and our fundamental ignorance that leads us to these sufferings.
3]since there is a cause there is a solution/resolution
4]the solution is the Noble Eight Fold Path, the Middle Way
the Noble Eight Fold Path is a lot like the 10 commandments, but more like the 8 suggestions. Buddhism is n a religion based on Faith. it is a logical practice that is suggested for those who are interested. One is encouraged to try the Middle way and if it works then good, that alone is ones motivation.. if it does not work, then fine.. you don't burn in hell, you just go on your way.
the Eight fold path is essentially
1]right view, Understanding the interdependent and empty nature of phenomena, including the self.
2]Right intension, developing the right attitude and motivation
3]right speech, no lying, gossiping, harsh speech
4]right action,virtuous activity, avoiding nonvirtious activity
5]right livelihood, work that does not harm others, but helps aspects of the path
6]right effort, developing a level of perseverance that is maintained over time
7]right mindfulness. developing a conditional awareness of ones own state and one environment and the ability to overcome distractions
8]right concentration required to achieve mental stabilization in ones meditation practice
there is a lot of information at
http://www.buddhanet.net and some information on meditation, which is a method for training the mind. and an essential aspect of Buddhist practice.