Study the Military Flight Aptitude Test. Practice taking the test multiple times. Get letters of recommendation from actual US Army pilots. Get a high score on your physical fitness test.
I applied through a recruiter. The process took 12 months. I interviewed at US Army (Jacksonville, FL) in Mar 2021
Interview
Street to seat for aviation warrant officers requires a series of interviews with the recruiter, the regional recruiting command conducts a board, you must pass an in depth physical, you must pass an aviation aptitude test, and pass an in depth background check.
Interview questions [1]
Question 1
If I had the option to save the aircraft or save the crew and passengers which would I pick.
I applied through a recruiter. The process took 5 days. I interviewed at US Army (Waco, TX)
Interview
Went in looked for jobs and picked one I liked. Once I picked one I like I went to MEPS in Dallas Texas and took a complete full body physical. Once that was complete I left from DFW to South Carolina and attended Basic Training.