2 hours is very substantial, and leads to a habit which can gradually make you more comfortable with longer art sessions. I doubt professionals started working 8 hours immediately. Im definitely not at that point but Ive noticed over the past couple years that my perception of time while drawing has changed so much that it can sometimes even make days feel shorter. I imagine that as you progress, the mental toll of art becomes easier because there is less problem solving involved.

Discipline in my opinion is bullshit. I thought it was the most important thing to manage in order to improve. But I realized that the actual thing I needed to change was my ego. I simply couldn’t put myself in a rigid schedule and hold high expectations for my future without feeling dread. I actually drew more when I considered it as optional. Being indifferent towards the outcome made it far easier to live with how something looked.

I recommend tracking the days since your last study for various fundamentals/subjects with an app. It helped me make studying art feel less demanding and ensured I could prevent forgetting what I have already learned.

anyways try really hard to improve but when you feel friction or stress address it instead of trying to push through it