Just a note, but there are kits for both flaws and aromas. "Flaw" kits tend to be less than "aroma" kits just because there are less of the former in any given kit - say, 12 flaws v. 88 aromas. Bernard's right, the kits are expensive. I've seen flaw kits for around $120, and aroma kits for anywhere $400+. Pretty ridiculous, if you ask me. Bernard provides an excellent home-version, in my opinion. The other thing I'd say, is taste a lot of wine. And taste of lot of the descriptors of wine.
Here's the 54 aromas of one "Nez du Vin" kits:
Fruit Aromas
1 – Lemon
2 – Grapefruit
3 – Orange
4 – Pineapple
5 – Banana
6 – Lychee
7 – Melon
8– Muscat
9 – Apple
10 – Pear
11 - Quince
12 - Strawberry
13 - Raspberry
14 - Redcurrant
15 - Blackcurrant
16 - Bilberry
17 - Blackberry
18 - Cherry
19 - Apricot
20 - Peach
21 - Almond (kernel)
22 - Prune
23 - Walnut
Floral Aromas
24 - Hawthorn
25 - Acacia
26 - Linden
27 - Honey
28 - Rose
29 - Violet
Vegetal Aromas
30 - Green pepper
31 - Mushroom
32 - Truffle
33 - Yeast
34 - Cedar
35 - Pine
36 - Licorice
37 - Blackcurrant bud
38 - Cut hay
39 - Thyme
40 - Vanilla
41 - Cinnamon
42 - Clove
43 - Pepper
44 - Saffron
Animal Aromas
45 - Leather
46 - Musk
47 - Butter
Grilled Aromas
48 - Toasted bread
49 - Roasted almonds
50 - Roasted hazelnut
51 - Caramel
52 - Coffee
53 - Dark chocolate
54 - Smoked
-get creative; try these in more than one variation ("bright cherry," sour cherry, dark cherry, baked cherry, etc.). IMO you'll have more fun, and you won't drop but a pittance comparatively speaking. And I believe you'll also get a more authentic experience. All my life as a chef, nothing fancy needed - just taste a lot, slow down and mindfully start to tease things out. It all comes.