Any beginner tips for Fallout 4? Anything I should do in the beginning or anything worth knowing that the game doesn't tell me?
If you are hidden when you initiate an attack, you'll crit the target for more damage. This applies to all attacks, from long range sniping to punching the back of their head.
Hoard all ammo you find. It's weightless (for now), and make a great way to buy the things you need. If you want an item you can't afford yet, sell the trader your un-needed ammo, and use those funds to buy your goods.
If you plan on making use of Settlements, then You'll need 6 points in Charisma, and you REALLY NEED to get the Local Leader perk, so you can share resources between all linked settlements.
When (if?) you begin the Railroad faction quests, get the perk that allows you to upgrade regular clothing. Those military fatigues/vault suits you wear under your armour can be upgraded to be BETTER than the armour. You can triple that by using Power Armour on top of that.
When you leave Sanctuary Hills for the first time, cross the river and head east. You'll find a decent sniper rifle that makes a great beginner weapon.