Investment Strategy in 2025

I have been investing 20% of my salary every month for the last 3 years, mostly in MF and direct stocks. However I have very limited knowledge about finance and share market and mostly do my own research before choosing any stock or MF. I want to increase my investment and optimise my portfolio based on the market. What is the best way to plan your investment strategy in 2025 ? What are the tools, reliable resources, etc that may help in improving one's portfolio?