I’m intending to invest in Global ETFs with a starting lumpsum of $20k. Which ETFs would you recommend?

Should I focus on just 1 etf (e.g VUSD/CSPX) so that my investment may compound faster? or to spread across 3 etfs for diversification : e.g 40% in SWRD/IWDA (which is better ah) , 40% in IUIT and 20% in EiMi?

will it be silly to even invest equally in CSPX, SWRD, and Eimi altogether?

apart from global etf, i’m also looking to invest in blue chip singapore stocks (banks) and considering skipping Sti etf for good. and will treat my CPF as my bond portion of my portfolio

appreciate ur help!