you very welcome and i am just making my way also
i think they meant about the inline and block from html point of view the semantic meaning not how css view it
this would help to explain what i meant with inline and block from the css point of view
in short block element start from the beginning of line till the end of it that why element like p start as new line that why it can align to left or right cause it aware of the width
but inline start from the point it show up till it end it controlled by the line that it display on it so it controlled by the block it part of so it does not know anything about the width
but you can ignore it as it part of the css course which you will learn later
let me know if i should explain it in better way
hope that help and have a nice day