Look into neuroplasticity. Your brain adapts to what you tell it is important. It's a process that takes time. Explore. Experience. Do you have a good local spice shop? Produce market? Garden center? Do you cook? Experience and pay attention and see what excites you.
But remember, wine appreciation isn't a competition. Find what you enjoy and allow yourself to enjoy it. Let wine motivate you. Or not.
I've had a bit of experience with the scent kits. They can be quite helpful in training yourself to identify specific scents. The quality doesn't seem to vary so my suggestion is to go for 1) Scent kits that match the types of wine you like, and 2) Lower cost if possible.
There's no point paying to load up on white wine aroma kits if all you drink is red, and vice versa.
The suggestions about putting your own kit together are also good, as the 'professional' kits are expensive. There are lots of aromas you can put together without even using the wine base as suggested in the WS article. In my experience it's really just about isolating a scent to make it easier to identify later. Whatever way you can do that is good. The expensive kits help, but they are not the only way to do it.
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