I've recently started to enjoy working out.
then On the answer of this question below, you will find useful info regarding how to improve your grip:
Painful grip on deadlift and lat pulldownPainful grip on deadlift and lat pulldown
After some time though,
you might find out that you enjoy more lifting heavier weights (some of us do) then for the rows (like one arm dumbbell rows for instancelike one arm dumbbell rows for instance) I would try weight lifting straps, they will reduce the strength you need to put on your grip.
for the pushing exercises, like dumbbell presses, I would try liquid chalk, it helps with your grip.