Waypoint gimbal pitch 75 no POI

I want to fly a roadway .6 miles. With the gimable pictch at 75, straight 2 waypoint with no POI, can i Fly this taking photos auto every 3 sec at 15mph?
I dont want to have to put a POI every 3 sec. or have the drone stop at each photo

Of course you can.

You can set a photo capture interval in either a Litchi waypoint mission or your camera settings.

You can pitch the gimbal at -75° by using ‘interpolate’.

All you have to do is read the online user guide and/or the manual of your drone.