Hello @sojibhasan and welcome to Hive as I see this is your introduction post.
Please note, each community has its own rules and it is best if you check the rules before posting.
We have a rule against selfies because we're interested in the users photography skills. You have 3 selfies here. I'm not going to mute this post, because it's your intro, but next time please post according to the community rules.
Thank you and good luck on Hive.
If you'd like, I have a collection of newbie rules at the bottom of my post.