You can't create items unless an admin lets you I think
You get credits from posting threads and messages (more in the credits thread)
You can go to your post and click on where it shows what people reacted with and it shows the users who reacted (I think that's what you meant)
You need to go to the image on Google or whatever and get the image link or in threads/messages in threads/pms you can do that plus you can also copy and paste it
There's a shop tab on the top and you can click/tap on an item and if you have enough credits you go yo your cart and complete the transaction or whatever you call it
If you have any other questions feel free to pm me or someone on the staff team <3