And hello to you Fakhrul! It's nice to meet you.
As Sheep already said, it'd be awesome if we got to learn more about you on a personal basis because it can help us recommend sections you might be interested in. ROM Hacking, as mentioned, could be one to start with if you're looking for help with tilesets and the section is one of the most popular sections on the forums but feel free to see what else you like, because we've got something for everyone.
I hope your day continues going well and if you ever need any assistance, Sheep and her fellow staff members are always there when you need them, but I'm always open for a visitor message if you ever need anything!