The first month is about learning the movements, not chasing numbers. Aim for three sessions a week built around five lifts: a squat, a hinge, a press, a row and something to carry. Keep the weights light enough that your coach can fix your technique between sets.
You will be sore in week one and fine by week three. That is normal. Sleep, protein and walking on your rest days do more for you than any supplement. If a set looks easy, great: add a little weight next time, but only once the last rep looks as good as the first.
Leave a rep or two in reserve on every set. You will build more strength over twelve weeks of steady training than in two weeks of heroics followed by a sore back and a month off.