If you are wanting to add a twitter widget the integrates nicely into a website you are actually going to need to learn how to make websites without the use of programs. Website building programs only get half a foot in the door. They are very limited and the markup is just horrible and they never validate.
Things you need to learn
- xhtml
- js (javascript). Do not confuse this with java they are 2 completely different things.
- javascript library jQuery
once you learn these things you can do all that you are wanting to do. But if you do not want to learn these things I would recommend hiring a web designer.
If you do not want to learn how to do it the right way here is the twitter widget. Just copy and paste it into your site.
http://twitter.com/goodies