Basically, form XYZ Ltd in Mauritius. Bill everything to this address and ask clients (or even an employer like CAM or SAM) to pay to an account in Mauritius, instead of an Indian bank account. Then bring back that money to India with no tax. Possible?

1st yr law student, itna mat chad ladder pe ki tut jaye. First complete tax course. Income accruing from your work in India is taxable in India, and the beneficial ownership and POEM of the company is in India- residency. Also law firms dont pay enough money to be profitable to make such elaborate structures, it happens when you transact above 50 crores, when the cost of making the structure outweighs the tax imposition.

Check India - Mauritius DTAA and sec9 of income tax act describing business connection

In your initial years, the tax liability is quite low anyway due to presumptive taxation. You pay tax only on 50% of your income (around 8 lakh). Total tax liability unlikely to exceed 70-80K, which is merely 10% of gross revenue.