Try your own first name as a warm-up. Say the name is MARK. Using the letter chart, M is 4, A is 1, R is 9, K is 2. Add them, 4 plus 1 plus 9 plus 2, which is 16, then 1 plus 6 is 7. So MARK carries a 7 vibration, thoughtful and a little private. Now separate the vowels. The only vowel is A, worth 1, so the Soul Urge of just this name is a 1, independent and self-directed. The consonants M, R, K give 4 plus 9 plus 2, which is 15, then 6, a warm and responsible outer impression.
That tiny exercise shows the whole method in miniature, and it is why numerology is easy to check and hard to fake. The arithmetic is fixed. What varies is interpretation, and the value of a full reading comes from seeing how your Life Path, Expression, Soul Urge, and Personality interact rather than reading any single number in isolation.