Im from Australia. I would like to work in America but im just not sure how to go about it though. Could I please have some info? Thanks?

You go onto the USA visa website and read it all the info is there..... you will need a high level STEM degree, years of work experience, a registered US employer who is advertising for a job they can't find anyone qualified enough to do in the US who will sponsor a work visa if you get the job

US work visas are sponsored by employers so you could start searching the web for the kinds of jobs that qualify for visas. This is largely going to be in the STEM sector for your standard long term visa or in recreation, hospitality or agriculture for your shorter seasonal and farm worker visas. The latter of those won't be useful to you unless you're Spanish fluent. But plenty of Aussies spend a summer working in camps and resorts in the US every year.

Canada, and Australia have a "work study" visa exchange for young people, where you can work, and travel in the other country for up to two years. However, Australia, and the USA do not have this. To work in the USA, you would need to move there with a skill that is in demand.

I recommend you try for Canada. It is a fair bit like the .States - many of us would say it is better, in fact, and Aussies are well liked there.

You have to get hired by a company that agrees to back up your work visa. Most logically, an Australian company with offices in America would be the place to start your inquiries and applications.

Check with US companies in your country and local companies with offices in the USA. For example, Hilton and Marriott hire international staff as interns.

Search "international exchange programs USA" and there should be many links to programs that offer temporary and seasonal work in the US. Examples:

http://www.ccusa.com/country.aspx
http://www.yummyjobs.com/
http://www.bunac.org/
http://www.ciee.org/wat/

http://j1visa.state.gov/participants/how-to-apply/sponsor-search/?program=Intern&state=any

Do carefully check any programs you might be interested in as not all of them are a good deal.

Good luck!

Employment in a country gives priority to citizens and authorized permanent residents first, and then additional workers are allowed based on country to country special agreements, extraordinary talents of individuals, or when local qualified workers are unavailable to fill the need.
The directory of VISA's is here
https://travel.state.gov/content/travel/en/us-visas/visa-information-resources/all-visa-categories.html
I assume you are unable to make a very large investment in creating a business in the USA. That is generally US$500,000 or US$1 Million. That is one way. Another is the US-Australian agreement.
Australian professional specialty E-3 VISA as approved by the US Department of Labor
http://www.ustraveldocs.com/au/au-niv-typee3.asp
Normally with a Bachelor's Degree or higher level of education in a field with a shortage of workers, or with special skills in the field. Generally, you are applying for employment either remotely or as a visitor and a US Employer wishes to hire you and is willing to go through the application and approval process with the US Department of Labor. This site describes occupations:
https://www.onetonline.org/

There are Temporary Worker VISAs valid for anyone, including Australians
https://travel.state.gov/content/travel/en/us-visas/employment/temporary-worker-visas.html
You need to find an employer in the USA to sponsor you, with their claim that they need you.
A global company can have branches anywhere in the world, and a US or Australian company hiring you in Australia can put you on assignment in the USA. I knew one Engineer at IBM where I worked who was from Scotland and kept getting renewals, raising a family in the USA and eventually becoming a permanent resident and then US Citizen. It is not common that way, but global companies do move workers around the world.

There are shortages in the medical field such as nursing. There are shortages in skilled trades such as heavy manufacturing equipment operation and maintenance, but that is not E-3 special Australian without a 4 year degree. The US Bureau of Labor Statistics shows jobs by numbers, growth, salaries, education requirements
https://www.bls.gov/ooh/
https://www.bls.gov/ooh/a-z-index.htm

The requirement of specialty talents and occupations and worker shortage filling is very common globally.
For a US Citizen to work in Australia, there are similar requirements. Each country gives priority to its citizens for employment, and that makes absolute sense because to hire you and leave a qualified US Citizen unemployed means that person is on government aid and seeking a job.

If you are not in demand for employment in Australia, it is rare you would be in demand anywhere else.
Desireable skilled workers with formal education can use that to work in another country.