First of all, you should read more books, ask more questions and visit more. There are still many dry goods about fitness, but they are all fragmentary. Starting fitness is starting to learn, and this knowledge is necessary.
If you have fitness friends around you, you can ask them to take you.
If no one takes you, at least find a friend to accompany you. Girls will need some help when they start making equipment.
In this respect, private education is really difficult to judge, but if private education is really professional and responsible, it is actually worthwhile for lonely novices.
Exercise should be gradual. That kind of spinning bike is very exhausting, and it is difficult for people who don't exercise often to keep up. You can also do it at your own pace. Long-distance running is also a good choice to improve physical fitness.
Every instrument and practice method and skill are different. Ask more, listen more and learn more.
Besides, buy a decent suit. A "professional-looking" suit can help you avoid some coquettish things in the gym.
This must be the first time you go to the gym.
Hope to adopt, thank you! !