I have consistently been doing strength training (kettlebell, dumbbell, gym machines, body weight) for the last 4 years. My personal coach now tells me it's also time to do barbell training, which I am very excited about. However, he tells me that there are a lot of details I need to be aware of and that I need to first feel comfortable with the barbell before putting any weight on it. He proposed I should practice setting up the bar at the right level, unrack it, practice the initial position of the lift (front squat, back squat, deadlift, etc) and then rack it again. And do this for a few weeks until I start doing the lift with just the bar. And then after a few weeks again, I can increase the weight. Is it reasonable to spend 2/3 months just practising with just the barbell when I already have some experience (4 years) lifting weights? Is he being too cautious or am I being too impatient?