I think you need to write another script if your first script is just mediocre.
A writer doesn't need three scripts or ten scripts to break into the business. Most agents, managers, producers and execs don't have time to read ten of your scripts. They can only read one script. Your best script.
If your first script is that good. Then it's all you need.
It only takes one script to break into the business.
But, realistically speaking, most scribes need to write many scripts before really finding their voice, before their scripts have polish and feel professional.
Personally, I wouldn't necessarily recommend writing in different genres. While writing in different genres allows you to find which you like best, you might never become a master.
For instance, with each comedy you write, you'll improve within that genre. If you write a mediocre comedy the first time. You're second comedy might get better. And you're third even better. But if after writing the mediocre comedy, you write a mediocre thriller and then a mediocre drama, you're not improving. And you'll never have anything to show to a producer or rep.
The industry will brand you regardless. If you have twenty scripts of all different genres but sell the action screenplay, you'll be branded the action writer. Your work will all be in that realm. Execs will not be interested in other scripts outside the genre you sold.
So, master that genre now. Be the very best action writer or comedy writer or horror writer. Later in your career, you can diversify.
Most agents who can
really move a career are only interested in writers with scripts that can sell. The business model has shifted over the years, and many agents don't have the time to develop new writers. As a result, the "manager" has become quite popular and helps to fill a void. So, you might want to look for managers who could read your script and say, "
I can't sell this one but I like the writing. What else do you have or is there an idea that I can help you develop into a screenplay?" Working with a manager can help prepare you for the marketplace. Also, when the time is right, he'll introduce you to agents.
So, you might want to put your energy into finding a manager. Do your research, as most managers are ineffective and there's only a handful that can really advance the careeer of a new writer.
