What’s a simple guide to go off for structure upper lower for first time

How do I start a cut and what’s the best way to go about is it better being aggressive so I can get back in surplus faster or taking it slow

I’m currently doing tbar row single arm pulldown and single arm row for back and I’m wondering if the single arm rows hits the same stuff as the pulldown and if counterproductive to hit them in same session and would be better off doing something else