And what is the difference between the swing of the press / push-ups / home squats from these exercises in the gym? If you have willpower, you can perfectly do without a gym. Internet to help HOW to do it right. This is with regards to losing weight and improving the external and internal state. But if you are quite a teapot-kettle, and if you need to build muscle mass, then save up to the gym immediately for a course of personal trainers, the coach will teach you how to perform each exercise correctly, because, for the result, very correct execution is important.
Any physical exercise will have a result if you do it regularly. Another thing is what kind of result you expect. If we are talking about losing weight, then even homework in conjunction with proper nutrition will have an effect. Yes, progress may be slower than in the gym under the supervision of a trainer, but it will definitely be.
If we are talking about weight gain, muscle mass, then it is already more difficult. At home, the arsenal of simulators and shells is still very limited, so it will be difficult to properly pump all the muscles. But a beautiful relief can be achieved even at home. To make it easier to build muscle mass, you can purchase a protein or gainer (especially if you have a lack of mass in principle).
Google home exercises and make yourself a program of exercises for different muscle groups for 3-4 days a week, strictly follow it - and the result will not be long in coming. Change exercises every 3-4 weeks to increase the efficiency of your classes.
If you feel that you are losing motivation, save up money for the gym - it is easier to get involved in classes there, and the money spent on the subscription will be an additional incentive not to shirk from workouts.
You don't have to spend money on the gym at all. For example, doing workout. In large cities, there are generally free outdoor sports grounds. This means equipped, not just 3 rusty horizontal bars. This is almost everywhere)
The correct training system matters - load calculation, correct execution technique, correct recovery and nutrition. All this is possible in any conditions suitable for this, incl. and at home. I see the main advantage of a good gym, not in exercise equipment, because a lot can be achieved by working with your own body weight and free weights, and in a professional personal trainer. Here's what you can spend your money on. If you are not chasing some serious results, then simple training programs can be found for free or for a symbolic price.
Of course it will! Set goals for yourself, find literate people online or offline. For example, YouTube has a lot of good channels. Just choose people closer to your age. You shouldn't be equal to a girl at 20 if you are 50.