The Amharic Fidel is an Abugida or Alphasyllabary, in which each character represents a syllable rather than a single sound.
Each consonant base can be modified to represent one of 7 vowels. There are altogether 34 consonant bases leading to ~238 characters + 49 more labialized sounds.
The apostrophe in the transliteration (') can represent a glottal stop on its own, or when combined with other sounds like (k') or (t') represent "ejective consonants."
Practice tracing each letter, then quiz yourself on them.
The syllable bases are split into two lists to make quizzing yourself on them a little more manageable. There is also a word scramble game and a typing game to help you learn to read common words and put them together.
Amharic also has its own way of writing numbers. The Fidel originally comes from how the Ge'ez language was written.