Firstmost I recommend you to take a look at the FAQ
It is packed with lots of information. Remember to take it slow as it will probably look really confusing at first.
Also, consider joining Discords where you can ask any queries that you might have. The one below was the very first I joined from the official website. I learned many things from there.
Welcome to HIVE, @amir.isyam. As a new user to the platform, I can understand how confusing everything can be at the beginning. I joined HIVE a little more than a month ago, so I know how you feel.
https://hive.blog/faq.html
https://discord.gg/xHKUjeC
Regarding changing your profile, it will look different for each front-end interface. But it's generally under Profile->Settings section. You can change your location and other details over there.
Have a good day, and see you around. :)
Thanks! Will check out the links! For the picture, my profile settings isn't working for some reason.