You might try looking into your local community college. Often they offer Adult Education courses for people looking for a career change. You can pick up a local catalog of courses offered or call to speak with a career advisor.
Some high schools will offer welding as a class to take. Some community colleges will also offer welding as a class for the community, not necessarily a semester class on its own. Otherwise one must wait until enrolled in a college. To find if there are any welding classes you are eligible for in your area, please see the American Welding Society website to find a location nearest you. http://www.aws.org/w/e/
www.photonwelding.net You can also search the internet for ones that might be closer to your location.
You will find great information on welding schools at www.weldingschools.com.
The American Welding Society has a list of schools at www.aws.org.
pipeline welding You could find them from many welding institutes round the world. check the websites.
Try adult education classes at any of the Community colleges in your area
Miller Welding helmets can be bought online at the official Miller Welding website, or one can find them on other online retailers, such as Amazon and eBay.
You can find welding jobs online at www.indeed.com/q-Welder-jobs.html. You can also check your local newspaper's classified ad section and craigslist.com.
An auto darkening welding helmet can be found in stores that specialize in welding equipment such as Northern Tool or Welder Source. Other possible stores include Amazon or Ebay.
If you already know how to weld, there are many forums online where you can find advice for this specific job, such as WeldingWeb. If you need help with the welding process itself, a local welding shop or auto body shop would be the place to look.
For more information on the railway welding questions, you can find them here: http://exam2win.com/online-tests/rrb-question-papers.jsp.
San Diego Community College Continuing Education has courses in welding. I would give them a call first.