At some point, you go to a senior person and you say to them, "I've been here X [months/years], and I feel like I've learned a lot. Someday I think I could see

At some point, you go to a senior person and you say to them, "I've been here X [months/years], and I feel like I've learned a lot. Someday I think I could see myself doing what you do. If my career goal is to have your job in 2 years, what do you think I should do?" Hopefully, this person is receptive and will give you advice. Meet with them periodically and check in. If you do well, they'll want to train you as their replacement when they inevitably leave or get promoted out of that position. Repeat ad nauseum.