Read More… how to modify it

Hello,

I would like to add read more to my content but only for a part of my text (small selected paragraph) and after this I want my copy continue.

Here is an example:

my content …. ………
……….. with read more (when clicked only some text will show up underneath)
and after this my content continues (even if noone clicks on read more)

They can click on read more if they don’t understand and need to read more, otherwise they just continue reading my copy.

Is there a way of ending the read more function? I’ve searched different plugins which show read more when clicked on but it hides all my text.

Thank you