MyanTyper teaches the layout that ships with Windows as the default for Myanmar: “Myanmar (Visual order)”, the KBDMYAN keyboard.
This is the standard Windows Myanmar keyboard (keyboard identifier 00130C00). Common consonants sit on the unshifted keys; several letters live on Shift combinations, for instance ရ is Shift+7 and ဋ is Shift+3, and Myanmar punctuation ၊ and ။ are on Shift+comma and Shift+period.
The layout is called Visual order because you type glyphs roughly in the order they appear from left to right. The most important consequence is the front vowel ေ (U+1031): even though it is stored after its consonant in Unicode, you type it first. So ဖေ is keyed as ေ then ဖ.
Every combining mark, including medials such as ျ ြ ွ ှ, vowels, tone marks and the asat ်, is a separate keystroke. MyanTyper breaks each target syllable down into its keystrokes so you always know what comes next.
Open Settings → Time & language → Language & region, add Myanmar (Burmese) as a language, then make sure the Myanmar (Visual order) keyboard is installed for it. Switch between keyboards with Win + Space.
Other layouts exist, including phonetic and third-party layouts. MyanTyper supports the exact Windows Visual-order positions; an input source on macOS or Linux may use different physical-key mappings even when it is labelled Myanmar or Burmese.
Reading a layout only gets you so far. Muscle memory comes from repetition. The Keyboard Foundations cover every unshifted and shifted Myanmar key within an independent skill-based progression, highlighting each next key as you go. See also Myanmar Unicode explained.