I'm interested in doing these stuff like Animation, 3D graphic, photoshop etc.....
But where should I start???

I have no knowledge of this except for MS Paint and creating animated GIF.
BTW, I can't really draw very well using the mouse as I'm lefthander.(I use the mouse with my right hand.)

So any idea??

search 4 more tutorial....get a tablet 2 practise ur drawing skill

here's a summary of what you need to know:

- drawing
- character development
- process in creating a 2D animation
- storyboarding
- 3D animation (modeling, texturing & rigging)
- video editing
- video effects (treatment)

tips ::
1) ask someone to teach the very basic of photoshop..(it's very important as your progress really depends on your basic knowledge)
2) focus on only one type of art (2d,static recomended)
3) as you're learning graphics, make sure you're also learning web development (css, html,php)..they'll come in handy as you want to go pro..

the most easy way out...
go sign up for these animations, art or related softwares for desiging classes...

u need video tutorials? pm me . i have a lot to share