[TYPO3] configuring a plugin via backend

[Antonio Reher]

Hi:
I'm sure there is an answer somewhere, but I've searched and searched 
and don't really know where to start.

I'm developing a front-end plugin for a website which displays an 
introductory text and a list of elements. My problem is that the only 
way I know of specifying the intro text from the BE is via TS...

plugin.tx_myExt_pi1.introtext=lorem ipsum lorem ipsum lorem ipsum
and then, in php, rendering $conf['introtext']

The problem is this is not the most intuitive way of doing it for a 
basic user and I think it would be better to just have an RTE field in 
the plugin editing screen where they can input whatever text they want.

I think there is a way of doing this via FlexForms, but I'm not sure I'm 
ready to use them yet... is there any way of doing this?

Can anyone help me?

Thanks everyone!
Antonio