Alexa can be used only by smart home people I mean we cannot use it for normal ac rooms or for normal homes there must high quality home that contains Bluetooth for every device. But for small homes, it can be used for Television purposes or for listening songs and all

Alexa is a company with terrible customer service. Whatever you do, don't sign up for their services (even free ones). Once you're into their system they won't delete your account for any reason, which means that your username (and in some cases your contact details) remain public in perpetuity. Note that this is something they don't tell you when you sign up!

Do not sign up for Alexa; avoid, avoid, avoid.