How can I invest in mutual funds/indices in India as an NRI using NRO account?

Hello everyone, I’m an NRI receiving rental income in my NRO account in India, and I’m looking for hassle-free, low-cost investment options for long-term wealth growth. I’ve realized that FD returns are quite low compared to mutual funds or index funds, and I want to explore better alternatives. Here’s what I’m looking for: 1. Simple investment options like index funds or ETFs for passive long-term growth. 2. Platforms or AMCs with minimal paperwork and good support for NRI investors. 3. Investments that ensure lower deductions (taxes/fees) and compliance with FEMA regulations. 4. Tips on managing taxation (TDS, repatriation rules, etc.) and minimizing hassle. I value cost-efficiency and simplicity over active trading. Would love recommendations on platforms, funds, or tips to make the process smooth. Thanks in advance for sharing your experience or advice!