Even though you can take your time, and build things at your own pace, the creatures of Valheim will still wander over to where you are, and attack you quite often, so you must be prepared for battle (or escape) at ALL times. Don't misunderstand and get the idea that this is a casual builder and explore game... Valheim, and it's inhabitants, WILL try to kill you at every turn, and WILL succeed at doing so, sooner or later, and probably numerous times.