BTC is considered the safest (grain of salt here because crypto is still incredibly volatile).
So I think something conservative portfolio would be maybe 80 BTC/15 ETH/5 DIVI (BTC/ETH/altcoin of your choosing).
If I want a more aggressive portfolio, I need to lower BTC holding, up ETH a little, and up your third coin? Is it a good plan?
With about a grand in USD to gamble. I probably don’t want to spread myself much thinner than 3 coins of course.
IMHO, I believe that the three-coin portfolio is already good. But if you have still available funds to buy it's better to make it a five-coin portfolio, And just make sure that those coins are stable and for the better choose those top-ranking cryptocurrencies in the market. BTC, ETH, XLM, DOT, and BNB I'm holding three of those coins. except for ETH and BTC which is I think too expensive for me to afford.