Yes! I'll try my best: there are two teams competing with each other. To win, your team must obtain the most points. You can gain points by attacking people (drawing their OCs) on the opposing team as you. Attacking people on the same team is friendly fire and doesn't gain points.
Different drawings have different multipliers which changes the total point worth. For example, a line art piece is worth less than a fully rendered drawing. A head shot piece is worth less than a full body piece. The more you put into it, the more points you will gain for your team for that particular drawing.
Hope that explains it! Lmk if you have more questions.