Any RDA with a Velocity style deck would be relatively easy easy to start with.
Not recommending anything specific since I don't know you vaping preference and your budget.
I'd suggest you buy a few spools of kanthal, maybe 24AWG and 26AWG to start with and start building simple coils.
Once your proficient with building coils in general get another thinner wire 32AWG to start with and start making simple claptons, then advance from there.
Can't recommend any specific jig since I don't use them and build everything by hand, for building claptons you will require a power drill.