Hi apu welcome here.
I am also from brahmanbaria😊

You may watch this post of bdcommunity Friday meeting they have a voice chat in every friday 10.00pm. You may join that to get introduced with the community . You will also get help from that channel.
For joining you have to download discord app from playstore and then join bdcommunity channel through the link given in the above post.Through discord you will also be able to promote your posts.Thank you😊