(PVE) I always get stuck.

Hello guys. I'm new to the game (3 weeks) and I've noticed that the game's progression design breaks my expectations sometimes. Okay, maybe the problem is with me, but I always find myself stuck in a stage where I have to resort to tutorials and tips on YouTube to learn how to beat that boss, etc. Have you gone through or are going through this? Is there a PVE team that covers all points and would make my leveling more fluid? I feel completely dependent on tutorials.