First, clip dead and broken limbs from the tree. Trimming damaged branches helps the plant focus on fruit production rather than repair. You should never remove more than 25% of a tree's branches in one year.
All these small branches are unlikely to fruit. They hinder pruning and complicate it. Remove these to see the tree better. The tree's growth habits and how to balance the major branches will be clearer.
Look inside the tree for spots where branches develop toward the center or cross over other branches. Fruit will drop early due to branch rubbing. They also block sunlight and airflow through the tree's heart.
Main branch or trunk is leader. All secondary branches come from this branch. How you handle this branch depends on how tall and shaped your tree is. Fruit trees want balanced layers. A leader will develop secondary branches and a third tier.