More content with widgets creates problems in blogger

Adding widgets is not as easy as it sounds.
You read stacks of help pages and waste a lot of time to set it all up.
In the end you are told you need to change your lay-out.
So disappointing a result...
Why?
No link to help for new lay out... No explanations...
Such a result is like being hit on the head.
Not the foggiest idea what is meant by: "You must change lay outs".
Something like that should be said at the start before one goes through many many pages to learn to get somewhere.