I started with:
-Ramos box + more spiders,
-Colette box,
-Mechanical Rider.
After 7 games with Ramos (Ramos, Joss, Howard, brass, arachnid, Mechanical Rider) i feel that it's great place to start (I should just replace arachnid with mobile toolkit). I'm lacking the variety of Mechanical Rider summoning (missing electrical creation and gamins), but it's still super fun to play. I didn't try Colette yet.