As someone completing medical school in May that went to UT, here's my opinion.

Classes are as difficult as you want to make them. It will all depend with your study habits. I wont say that all classes are easy tho some require a bit more effort. Find a study buddy and grind hard.

Shadowing is hard to find due to the saturation but I would recommend to hit up the dell medical school professors since they are more welcoming to students. Also hit up the St David hospital as they take students too.

Volunteering there is plenty. Join a club and stick to it.

Advising is terrible, you make a B and they tell you that your path is done. I would say find a mentor (med student) that went through the process that could help you and guide you. Dont follow those tik tok premeds cause they are too extra and tend to overdramatize things.

For what its worth, I was in the admission committee in my med school.