HOW DO I POST A QUESTION ABOUT MY CAR AHHHHHH!???? Help please

I guess like this?

2006 Infiniti M35 V6 3.5L
RPMs drop on highway then kick back in. Dash lights come on Service Engine(stays on since this started), VDC & SLIP. These lights stay on until the car turns off. Also when this happens I noticed the RPMs jump the whole drive. It’s a long hesitation to start. Then it just wouldn’t start at all. Sent it to the shop. They replaced the Crankshaft Sensor and reset the ECU. The day I picked it up I noticed a slight hesitation to start. Went home and on first start up it has that slight hesitation but not long. After I drive it, it takes longer to start now. Could anybody help me figure out what’s going on now? Plz.

I tried replacing the Camshaft sensor myself with aftermarket parts(BAD IDEA) didn’t work of course that’s when I sent it to shop.

Did you reset the ECU after install?

i tried to figure out how to post on this site. Can you tell me how to get to the tech section? Plz. I’m not even sure if this is how I reply. Lol sorry