Take that new pick-axe of yours, and build a killing pit outside your base. Make sure it is outside your base defences, but not too far. The enemies will always zone in on you, so by leaving your base you save it from any damage. I practised with a shield early in the game, and when I was wearing bronze armour I was soloing trolls by parrying their attacks and stunlocking them, thanks to my shield. Once one gets familiar with using a bow and a shield death comes a lot less often.

https://steamcommunity.com/sharedfiles/filedetails/?id=2731518595

Events have a 20% chance of starting every 46 minutes if there is a player within 40 meters of at least 3 base structures (except for the "You are being hunted..." event which doesn't require player base). The event is randomly selected from available events. One way to avoid those major invasions is to make sure you do not have 3 base structures within 40 metres of each other (pretty sure that is the distance). A trick is to destroy your forge while you need to use your stonecutting bench. Then after you have finished using the stonecutting bench, for whatever construction you need it for, destroy it then rebuild your forge. This way you only have 2 crafting benches close to one another at a time. This will stop the majority of large invasion events from occurring. Within 2 or 3 minutes of building a forge in a distant base I built today, where I already had a workbench and a stonecutting bench, "The Horde is Attacking" event was triggered.