gear selector is hard to get out of park when on a steep hill

You are placing a lot of pressure on the parking sprag when it is on a hill. As a result, it is hard to move from park. You can avoid this very easily. Place the parking brake on so that it holds the vehicle in place. Then, place the vehicle in park. That way, the pressure is on the brake and not the transmission.

thank you so much for your advise, do this gender ?

I'm not sure what you mean by "do this gender." Can you explain?

dear Sir,

i mean to say, if i forget to follow your instruction , it is danger to park without handbrake, if not so, even this is difficult to change the gear it is not effect the system,

Regards,
Rao

Okay, now I understand. You should always use a parking brake when leaving the vehicle. However, placing it in park should hold the vehicle for you.