If you have not already passed the ATP written, the new regulation requires you to undergo an ATP Certification Training Program before you take the written test. This course is 30 hours of ground followed by 10 hours of FSTD/SIM training. The only currently approved course is at Embry Riddle.
After completion of this course, you will then need to take the ATP Written - Multiengine. After that you will need training to proficiency in the B737 (minimum of 3 hours within the last 60 days) for your checkride. You are then eligible to take a combined ATP/Type Rating checkride on the B737 and have an ATP with B737 Type Rating issued.