On the other hand, if your book is complete, and you're happy with it... There's a thin line between caution and procrastination.
You never know until you ask.
Back in the last century the lady who typed up the submission copy from my rough two finger typed script put me in touch with one of the UK's leading agents. He liked my book but was unwilling to chance his own reputation, as opposed to the reputation of his firm. So he passed me on to the 'new girl'. She, being a lean and hungry new agent, worked her arse off and found me a publisher, Robert Hale.
She didn't like my second book, so we parted amicably enough. She is now highly respected with her own stable of 'names'.
I then wandered off to write shorts, articles, and won regular columns in a few magazines over the next couple of decades.
So you never know until you ask.
Gyppo