hi, Any beginner step by step guide for smart home? was looking for light dimming , off/on that can use app or voice activated. and door sensor (security) .

ok, now i have dillema, my parent insist that i install a grill for my condo, but i dont want cause it feel like cage, i want to show that if i install sensor at all my window and door, and it link to my phone, it should secure enough. or maybe put alarm at house where it trigger, anyone done this? any tips or experience to share?