One of the best online courses is Lynda.com

It is a fee course, but you can move as quickly as you want so if you have a lot of free time is is a great deal.

Setting up your own business is always risky, and depends a lot on marketing skills by you or someone else.

sameersony wrote:

 

Thanks but is there any specific thing i can start and finish in a short period and can get job in small companies to start with.Is it possible i get all the specific answers online?And how would i test my work?Plz help sir

I don't think it is possible to become proficient without investing time and effort.  Lynda.com (already mentioned) is a good resource because it has entire courses and not just individual videos highlighting certain effects. Kelbytraining.com also has good retouching courses. They do cost money, but if you are willing to dig in and spend several hours a day on them, you can learn a lot with just a one-month subscription.  This is a lot cheaper than taking a course at some school.

Your ability to find work afterwards with no formal schooling will possibly depend on supply and demand where you live.  In any case, you should start creating a portfolio to showcase your work.  If you post some of your work here you are sure to get at least some feedback.

Just a thought, but are you a member of the Retouch Pro forums?  That would be a great place to hang out, read all the threads, as a few questions etc.

http://www.retouchpro.com/forums/photo-restoration/

[EDIT]  Thought I'd add that one of the speakers at the Photographic Society of New Zeland's National Convention last year was Ian Handricks who start a photo restoration business some years ago.  The business quickly became supported by venture capatilsts and Walmart, and grew into the largest photo restoration business in the world.  Ian also ran a very interesting workshop at the convention demonstrating some techniques which were completely new to me.  One that stands out in my mind was rescuing an old photo which had suffered severe silvering.  The usual trick of using the best RGB channel would not work, but Ian converted to CMYK where the cyan channel had acceptable contrast.    I just did a quick Google to see if I could find the same technique, and not surprisingly, ended up at Retouch Pro with this thread.