@nefenjo you increase leadership by putting points into it under skills. You equip items by going under Heroes and then clicking the hero you intend to put the item on, then click the item and click the hero's inventory. If you look at the upper left corner of the info screen that pops up when you click a flag, it will say what faction is giving the quest, and storyline quests are pretty clearly marked.
Here's a robocats level. It's not short, not easy, but it works.
Please either change it or make an option to change the colors of your opponents, because I can't tell the difference between me and yellow planets, which means I keep getting killed from what I think are my planets.