UOB one is great choice for salary crediting and spending. Remember to take a look at Singapore blogs to see which conditional high interest account suits you.

Simple S&P500 will beat any ASNB returns. If you want more returns, VGT or IUIT. If I would invest into ETF, I would pick either VGT or IUIT

Yes. I am gunning for early retirement. I am already LEAN FIRE. Aiming for FAT FIRE.

If you are buying stocks, do not diversify so much. Focus on 20 high quality companies. A good place you can start is consistent high gross profit of 40%, ROE of min 20% operating profit of min 20%, debt to equity of 0.5 and below for past 3 and 5 years. Yes there will be quality companies that do not fulfiled the above criteria like Costco.
https://fiscal.ai/screener/

If you don't know what you are buying or why you are buying better focus on ETF.