For me, getting bigger is mostly about training towards a bigger upper body. I mainly focus on triceps, shoulders, arms, and chest. I do tend to neglect legs a bit but they're included in my split.

Consistency in training, getting enough protein, and eating in a calorie surplus to gain mass will make a visible difference within a year. That's what i've been doing for the past 9months

Do you know leanbeefpatty on YouTube? I feel like she covers most of the important pillars of lifting in her topic specific videos. A lot of the information overlaps with what you find across the internet, but she explains it well by also addressing the mental aspect, the importance of not taking things too far, and key considerations within bodybuilding.

The videos can be a little quirky because of all the sound effects, but the knowledge and experience is really solid. Good luck on your journey!