Newbie here. Tips?

Any tips for me? I'm relatively new. Started playing around 3-5 years ago, got to level 63 just by following people around and doing what they do with their quests, then stopped entirely. Started up again recently and trying to complete everything on my own and learn. Struggling with weight. I have a bad habit of carrying around every bit of ammo and the majority of my guns 😮‍💨