Specialize or switch for Higher salary ?

I am a 27 Male, Data Analyst (Transitioning to Data Scientist next month)did my B.Tech from a Tier 3 college and PGD in AI from a new University Total Experience (3.4 years): .1 yr - Worked at a Big4 firm as a Tester after B.Tech. 2. Analytics career began after PGD with the GST department of a state government (Tax Fraud analytics) (2.4yrs)

Professional Achievements:

• Worked on GST-related projects and published various fraud reports
• Contributed to effective enforcement, potentially resulting in fines exceeding 300 crores
• Implemented fraud analytics models that were appreciated by the Finance Minister (Nirmala Tai)

Current Situation:

• Salary: 12 LPA (No recent raises, feeling stagnant and subject to office politics)
• Current job feels monotonous and limited in exposure to advanced Deep Learning (DL) and AI technologies

I am interested in becoming a startup founder in the consumer tech space in future also.

Question for Advice: Given my current situation and future aspirations, should I:

1. Continue working with another state government GST or move to Central GST?
2. Explore opportunities in startups or corporate roles with a focus on higher salary?
3. Should I change domain or think of specializing in this domain, what should be my career trajectory?