My setup for almost every situation:
-My Matin slingbag-backpack
-Lenspen, microfibre cloth, blower and some cleaning gear
-Some pens, a notebook, rulers??
-Handphone, wallet, a cap, other personal belongings
-Sweets & snacks
-Some magazines and books
-My kit lens 18-55mm
-Tokina 20-35mm wide lens (a gift from my uncle )
-70-200L lens (my friend's, rarely )or my tamron 18-200mm (very light lens)
-My mount-on steinzeiser 62mm
-All my lens hood and filters
Thats all I carry for a beginner!