When accumulating and you have cash, you can hedge and do BOTH lump sum and DCA.

Otherwise, you DCA as cash comes in, assuming your income is fiat based.

If you're getting into the stock market for diversification, I would suggest some sort of one fund thing, or couch potato style, like a total stock market fund or S&P500 equivalent.

If you read a lot of FIRE related websites and blogs, you'll have an idea of a typical allocation like 60/40 equities/fixed income.