I am having some issues when I try starting the engine and I can wiggle the gear shift and it starts.
where is the Natural safety switch located.

 

inside the transmission. NOT a job for a novice to replace. however, your problem sounds like a cable issue (worn, out of adjustement or anchor point clips are broken).

the BEST method to verify this is to use a quality scanner with data stream... not a crappy $50 code reader but a REAL scan tool. this will show on the data what the shift lever position is sensing for it to start.