You can train your grip strength at home! Try building up to the double towel hang. It's an uncommon exercise that builds strength (and muscle!) in our palms and forearms. The "type" of grip strength this uses seems to be different than the ones we use to do pullups or lift barbells. It's not uncommon to struggle at first. Rope climbing uses the same grip! Training grip AFTER your pull sets for a 2-3 sets is a great way to incorporate grip training. Simply build up to around 3 sets of 60 seconds