Effect's to use for my GreenScreen?

Okay many thanks for the answers so quick.

I had not expected so long explaining about this, it's like you think i'm a total newbie.

I know about lightning/shadows for GS, i have my studio setup.

I was just asking simple question about what to do next.

( One more thing i've already record the background with same light, distance, angel. )

That is not so easy question to answer and to be honnest there is no one magic button in AE or in any other compositing tool to "make it look natural"
Short:
1. You have to make your green screen footage lit the same - or as close as possible - to how your backround scene was lit. Or if you put your already shot gs footage into 3D environement - put light sources in the same places where trhey were when you shhot your GS - that is what sell compositing in most efficient way
2. remember about perspective - both layers (gs and background) have to more or less in the same perspective/angle
3. use blur or grain effect - depends on what will be neceserry to blend fg and bg together
4. make/use light wrap  effect - you can do that by hand using tools that you have in AE or use one of many plugins avaliable

But on the end we can just speculate what you need and what you can use because we don't know any specifics of your workflow, your footage and final effect that you wish to achieve.

The most important part of green screen work is the lighting and photography, not the post production.  It's an art form unto itself, and even big Hollywood productions often get it wrong.

The talent needs to be lit in a way that mimics the background environment, including light position and direction, shadows, brightness and tone.  All whilst lighting the green screen itself evenly and brightly, with enough separation between the talent and the green screen to prevent spill or reflection onto the talent.

Once you've got the best shot you can get in the can, using additional matte effects and spill suppressors can be useful, depending on the footage, the amount of movement and motion blur in the frame, etc.

But the effects aren't important until you've got the footage right.

I do not understand your problem or your workflow. From what you said, you filmed yourself with a green background. Then you said you want to add a realistic background like in real movies. What other effects? There are no specific effects you use to make greenscreen compositing look more realistic. It all planning, very careful planning, lighting, photography, and then compositing.

Perspective depends on the camera position so the angle and distance from the subjects must match. The lighting direction, intensity, and color much match or be made to match. If you want foreground elements they must be separated from the background.

A screenshot or two will help us help you. I suggest you spend some time doing some studying. If you are really interested in becoming good at this it's going to take some time. There is no magic button. This is just one of the books you should have in your library: The Filmmaker's Guide to Visual Effects: The Art and Techniques of VFX for Directors, Producers, Editors and Cinematographers

The underlying techniques are all the same, no matter what software you use. When you understand the basics, making AE do the work is pretty straight forward.