So those of you adventuring into double knitting land with my new beanie, here are some links to tutorials, by my good friend Nathan, that you might find helpful (I certainly did when I started out).

Two Colour Alternating Invisible Cast On
https://youtu.be/Y5oi2fknnH0?si=QtzkypIjwckdgYIL

Changing Colour part way through an Invisible cast on
https://youtu.be/ZkICCT9uIIQ?si=lHd528YdffU3cjkb

Use either a M1R or M1L for the DKM1
https://youtu.be/oYgPvA1qoa0?si=PjFfrFlgVMKJgg-W
https://youtu.be/AM75Gk-KXi4?si=5bnxRMEC-si2t_zH

1/1 RC and 1/1 RPC
https://youtu.be/5p3YW6u88UY?si=eDFFIBEoX-Bh9iGS

1/1 LC and 1/1 LPC
https://youtu.be/McR2903ZLt8?si=a28hTOkFu-o3o1LI

Right leaning single decrease (DKRD1)
https://youtu.be/UBU5NPm4qb4?si=vTBud8Qro9rK7sLd

Left Leaning single decrease (DKLD1)
https://youtu.be/81svJ88QsGI?si=5p7S1YLl8s_GRjcU