So first of all, you know what upper limb strength is.
The most common is biceps brachii. Do I need to introduce this? And deltoid, pectoral and abdominal muscles.
If you go to the gym, the fitness equipment will be easier to practice. A bunch of dumbbells and barbells, and bench presses.
Instead of going to the gym, I want to practice in the dormitory or at home. Then you can do the simplest sit-ups and push-ups, as well as flat support. These don't need fitness equipment.
Not to say how much strength training you practice every day, but to persevere and keep a certain amount of exercise every day.