photoshop design

I'm looking to create a postcard. It's going to be 6.5 x 4.75. After it's cut down, it will be 6 x 4.25 I attached a couple mock-ups. These mock-ups don't look professional. They look cartoony. Please make it look professional. I also attached a rough sketch on how I want the front of the postcard to change. Please move the items around to have it displayed like the sketch. On the back of the postcard, again, please make professional. I would like an image of a real computer monitor with my website screenshot on it. Please create a mock-up using photoshop and if I like yours, I will select and pay. Thanks. I must see what I'm paying for so please send a mock-up. I don't want to see your portfolio!! Must show me mock-up to select and pay you!!!!!!!!! thanks, Michael