1 - Incline Bench Press
One of the most important exercises for chest, why? because the best bodybuilders in the world had in a time of their career problems in that areas the upper part of the chest , so to avoid that you must start by incline bench press after warming up because it's a difficult one and also to be in your full energy to perform well on that exercise .
2 - Incline Dumbbell Press
Also much important as the bench pressing , but this time make sure to start with light weights to avoid any kind of injuries especially if your arms and shoulders are still weak you can't push up heavy dumbbells, so light weights with a slow movement gonna be just perfect for that upper chest.
3 - Butterfly Machine
Good workout to squeeze chest muscle and create a mass and that by holding your hands to each other and create a pressure on the chest part, keep doing it for 2 sets of 8 repetitions with light weight of course we always play to avoid injuries especially on our first days at the gym .
4 - Chest Dips
of course you won't be able to start doing that on your first days at the gym but you gonna sure find Chest Dips helper it can help you to pull up some of your weight because you still have weak arms and back muscles.