WHEN I START MY CAR I HEAR TICKING SOUND IN DASH LAST ABOUT 30 SEC. AIR OR HEAT

DOOR ACTUATOR GEARS A STRIPPED INTERNALLY. VERY COMMON

can i install this myself? can you tell me how. i priced opne at 36.00

That is probaly a bigger job than the average person should tackle. The HVAC system several door motors and most require dash panel removal. Best take it to shop that does a lot automotive HVAC work and has experience with that type of work. More labor than part cost.