The advantages of not being hired in the first wave are first, that you will not have to see your dream job come up and then not be able to even apply for it because you have already signed a contract. Second, you will experience the interview process a few times and learn how to land a job. This experience should never be undervalued since it will provide knowledge for the next job you try for. Third, the most interesting jobs come up after May and you now have a variety of jobs to look into. Never feel dismayed if you do not catch the second wave after the end of May. There is a third wave, too.
Over the years I have found that some of the plumb first-year teacher jobs come up at the end of August/beginning of September. If you missed the first wave, and the second, then do not be discouraged. Sometimes someone has to move at the last minute in August because of a spouse's job change. Sometimes, someone falls ill and a new teacher has to be found at the last minute. The thing I am telling you about here is always be ready. Have your resume polished at all times. Keep your interview outfit clean and pressed in the closet. Prepare how you would go to an interview at the drop of a hat. Use feeds to automatically have ads sent to your email. Have contacts in divisions alert you about any positions coming up. Don't wait for someone to call. Be a sleuth and be ready. Your dream job awaits, but you must be ready.
Please look at the "Get a Job" page at the top for typical interview questions, resume & cover letter templates, and job links.