To much family

(M16) On my mothers side my great grandmother had 5 kids, my grandmother had 5 and im the last of 4. On my dads side my grandfather had 4 kids with one woman. And 2 with my grandmother. I know im a bit young, but its by belief their are enough of us. Ill let all my half siblings make that choice. But im fairly certain my 2 brothers stand where i do