you really have tons of options what we told you is just the tip of the icebeg, for example you can still use the playground if you enclose your text inside single quotes which will convert it to a pharo string or double quotes which will convert to a comment. Having it as a string gives you a lot of parsing abilities to extract any info you want. The string class comes with methods like substrings , tokens etc but my favorite way is regex that can do some pretty complex detections.
TextMorph also comes with PlugableTextMorph which includes a scroll bare for long text and there is also the option to auto accept any new contents so you dont have to manually accept them.
If your get info from websites then its better to use BeautifulSoupd a library specialised on extracting information from websites the easy way.