Welcome to AO. Have Fun. Nice to meet you...
As to you questions: 1) Where can you post your pictures? In the Gallery section. Link: http://www.animeonline.net/gallery/.
2) who takes requests to have a banner made? Sorry, but you need like 50 posts at AO to request for a banner. So, post a lot. Heed my advice!
If you have further question, please PM me or other great members here, for they will lend you a helping hand to provide answers to all of the questions that you have. Okies?