Request for help to play notes on the computer keyboard

I'd like to ask for your help, I've just discovered how to use the computer keyboard to write notes in muse score, but I'm having trouble:
1- how to put chords along all the notes in the bar, I can do it for the first note, it always appears on the first note and doesn't progress from there
2- knowing which keyboard key to use for spaces and intervals
3-Knowing which key on the keyboard to put . and increase the duration of the note
4-using the keyboard for percussion notes