That's the way work is. Every workplace has a small circle.
It doesn't feel good to join it by yourself. If you don't join it, you will be isolated by several parties, so it's recommended to strike a balance between the two sides:
1. Observe more calmly
Don't offend both sides, and be more tactful when things happen
2. Pretend to be sincere
Always show that you don't know anything and don't intrigue
3. Do more things and talk less. Take the initiative when you have a job
4. Communicate more
It's really important to have dinner together after work and communicate sincerely. Moreover, people are emotional animals and care about each other.
In fact, these are all necessary in the workplace. Don't be too concerned and too sensitive. In fact, it's best to grow up through your own experience. You will slowly explore it after more experience. I hope you can make good relations as soon as possible.
thank you