This is very simple to do. Go into the builders section of your admin. It is a drag and drop interface.

Just remove those blocks from public view. So not you have no more RSS on the index page and the also make the change in account builder.
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Then you are done... You can also remove the shout box the same way.

Please explore your admin panel a little more. you will find that all the tools are there for you.

Regards
Simion