You don't think a Nautilus Mini is a good starter tank? It's highly recommended by everyone for the taste and ease of use. A lot of friends wish they had just started with the Nautilus Mini instead of buying a cheap tank (i.e. kanger mini pro 2) because it's got such better coils. In terms of which mod to match with Nautilus Mini Tank
, maybe you think that the 30w mod is not necessary right off the bat, but it doesn't hurt to have the ability to go sub-ohm in the future. I recommended the 20w, but for the extra $10 the shop suggested the 30w in case you wanted options in the future. Also I recommended trying a different juice or buying higher nice juice.