What will be the impact of social security payment?

It doesn't matter, as long as it is bought recently, the pension is calculated on a monthly basis. If you do it there, don't talk about it, because the company can pay less. It won't affect health insurance. If you don't do it in that company, he will stop it for you, so you can't swipe your medical insurance card. If you do it there, the payment in the current month will not affect the medical insurance card.

This will only have some impact on the old-age insurance, and nothing else.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.