Buying individual company Stocks vs ETFs?

Currently purchased individual stock for companies like apple, Microsoft, google, NVDA, Tesla, and META.

Have some left over investing to split into ETFS (s&p 500) and Nasdaq.

Should i just transfer the money from individual stocks into ETFS instead of splitting my investing into half for individual companies and then the other half for ETFs? and if so please reccomend me some low cost/passive ETFS. esp for Nasdaq.

Thanks.