60 kg, 175 cm. You are thin. The standard height-to-weight ratio of China people should be:
Standard weight = height cm-105, so your standard weight is 70KG；; Up and down 2.5 kilograms is not a big problem.
You want to exercise your muscles, so you are a boy. Based on what you said and my experience, I would like to give you the following suggestions:
First, do a good job in pre-exercise preparation activities; This is very important. You are 20 years old, and you are the tail of adolescence. At this time, your bones and muscles are just fully developed. If you do strenuous exercise without adequate preparation, you will get injured, which will make you owe a lifetime debt. So, where do you want to exercise, be prepared; As long as you exercise, you must prepare for the activity, remember!
Second, empty-handed expansion of chest muscles (this is a warm-up activity)-then do 15 push-ups-relax your arms, and then prepare-then do 15 push-ups (30 per day is enough, no need to do more, but it must be of high quality);
Third, get up and exercise your waist and buttocks. After doing warm-up activities, do 20 sit-ups-get up and exercise-and do 20 more (still don't need to do more, but each one should be of high quality, get up slowly and be in place, otherwise it won't work)
Fourth, get up and do relaxation activities and warm-up activities-use 5KG dumbbells to open two groups of chest expansion, 10/ group; Relax in the middle. Be slow and in place;
5. Move your waist and hips, lie flat, hold each other with your hands, put them behind your hips, and keep your lower body still. Try to lift your upper body slowly until you can't move any more. 10/ group, do two groups, and do relaxation activities in the middle. This kind of reverse sit-ups has a good exercise effect on the lumbar muscles, that is, it is necessary to persist;
6. After relaxation, hold a dumbbell of 10KG vertically with both hands (note that the dumbbell should be vertical, and the distance between the hands is too far, which is not good for the shoulder muscles), bend over and lift the dumbbell vertically with both arms, and then lift the dumbbell to the chest with 10 in each group (the waist is still bent), and do two groups, relaxing in the middle;
Relax for two minutes and go jogging/brisk walking for thirty minutes.