Place a chest down to claim the land around it. You will be given a youtube link with more info, watch that and it explains almost everything about land claims.
/giftpet to give your pet to another player. Right click with empty hand on a stair block to sit on it. Stand up by sneaking.
No cheating, no griefing, no x-raying, no botting. Minimaps are OK to use.
PvP is enabled but it works completely differently from what you think. It requires zero skill (this used to be a no-PvP server). Every player has a “base” which is the average location that the move around while playing. Usually that will be near their actual house/base/castle/whatever. When an player attack connects with another player, the damage is applied randomly to either the attacker or the defender. The closer one is to their base, the less probable it is that the damage will be applied to them. That means that fighting near your base and far from someone else’s base will give you an enormous advantage. Compasses point towards your base and will also tell you how far you are from it. Keep in mind that the distance that compasses give you from your base is the effective distance and not a straight line distance. The effective distance is what is used in PvP calculations and will be affected not only be the real distance between you and your base but also from how much you’ve recently moved your base around.
TL;DR: PvP is completely based on luck and not on skill and it favors a lot those that fight closer to their base.
Try not to do things that lag the server.