Before exercise, he weighed only more than 60 kilograms and looked very thin. Because of this, I sometimes lack confidence, especially in front of girls.
Now that you have asked this question, you have made up your mind. It's hard to exercise muscles, so you need to persist. It's hard to hold on. At the beginning, watch more muscular men, watch more fitness videos and tutorials, and slowly cultivate your interest and desire for muscles and strength.
So gradually form a habit, we must enjoy every fitness, and we must learn to enjoy fitness. It will bring you muscle growth, strength increase, body change and self-confidence increase, which will make you glow with a completely different spirit.
At the beginning, I suggest you run and do push-ups when you are free, which will be the starting point of your fitness. If you feel bad, buy dumbbells, do dumbbell squats, and do dumbbell lunges. Stick to 1-2 months, and you can see the change of figure. Squats and lunges will make your thighs thicker, your hips stronger, your figure better, your clothes better, and your confidence stronger.
As for dumbbell fitness, you can watch tutorials, learn movements and watch videos online.
When you really love fitness, go to the gym, where there are ideal equipment. Going directly to the gym was strongly discouraged at first. The point is that you're not sure if you can hold on. I have met many people who are only fresh for a few days, but few of them really stick to it.
So let's start with push-ups and dumbbells.
As for the systematic training of muscles, we should have the above as the foundation. Go to the gym when you are ready and make a plan. Thickness and width of chest, shoulders and back, upper chest, lower chest and chest. Shoulder, deltoid anterior-middle-posterior bundle, latissimus dorsi, teres major. Arms, biceps brachii, triceps brachii, buttocks, gluteus maximus. Thigh, quadriceps femoris, biceps femoris. . Wait a minute. . .
As long as you think infinitely, you can do it!
I spent an hour answering your questions, hoping to help you.