Native Midwestern American English speaker here.

One other small change I would make is:

Instead of "Let's go back into good old days"

try

"Let's go back to the good old days"

I'm also not sure what you mean by this line:

"back when life was great and beat was young and never blue"

'and beat was young and never blue' - do you mean "and the beat was young and never blue"?

The definite article, 'the' might be missing.