I just installed joomla and I wont o add a content but whenI creating new section , catgory, or any else, index page doesnt updating
your question is not very clear... from what i understand the articles u made dont show up ? if thats the case then just clear ur history, and try again... or try with a differnet browser
in order for it to appear in the index you have to set font page to yes. you do this when you are writing your article just take a look a at the picture below
i you make an article for the font page than select the article as an front page .what ever you edit here will reflect to you on front page.if you still are not able to solve this problem than free to PM.
I think he is having classic joomla caching problems. Check your settings, maybe try disabling cache... Pages are cached and updated every so often for speed issues in compiling data to serve.. many poor joomla installations or hosting setup problems cause cache function not work very good. Or just misconfigured as well... You can change the time interval to refresh pages, or turn it off from control panel. There is also a clean cache feature under the tools in admin... you can use this to force pages to be re-created