is it okay to split sets up during the day? i lift at home and just starting out but i don't have the energy to do three sets of 15 of five or six different things in a an hour.
From a strength standpoint it doesn't matter. You can perform one set in the morning, one at lunch, one at night. You'll get the same strength gaining benefits as if you performed them in close order. If you have other goals, such as hypertrophy or work capacity, you won't see the benefits of splitting it up through the day.