Raids are inevitable. The Basics - RimWorld Wiki recommends completing the in-game tutorial first to master the combat UI.
: Build a single large wooden room or mine a cave area. Get everyone's beds under a roof immediately to avoid the "slept outside" mood debuff.
: Build walls with a single opening to force raiders to come at you one by one.
: A "Mental Break" can end a colony. If someone is "Stressed," check their Needs tab. Often, giving them a better room or finer food (once you have a stove) will fix it.
