Question

I'm trying to write an extended metaphor about myself but I'm stuck.

So far I have

I am a seed small..

Answer 1

Have you read some really good extended metaphors?

Here is one. (Do you recognize who wrote this?)

In a sense we've come to our nation's capital to cash a cheque. When the architects of our republic wrote the magnificent words of the Constitution and the Declaration of Independence, they were signing a promissory note to which every American was to fall heir. This note was a promise that all men would be guaranteed the inalienable rights of "Life, Liberty, and the pursuit of Happiness."
It is obvious today that America has defaulted on this promissory note insofar as her citizens of colour are concerned. Instead of honouring this sacred obligation, America has given the Negro people a bad cheque which has come back marked "insufficient funds." But we refuse to believe that the bank of justice is bankrupt. We refuse to believe that there are insufficient funds in the great vaults of opportunity of this nation. So we've come to cash this cheque - a cheque that will give us upon demand the riches of freedom and the security of justice.