How do you think can a woman become a good plumber? I am wondering because it is very well paid. But I am not sure if I will be able to do it.

If I become a plumber should I upgrade my license after some period?

There are many apprenticeship opportunities that a Plumber can start with for his career. This is even more possible once he has basic qualifications, such as GCSEs, City and Guilds, SVQs or NVQs. Some apprentice start in their early teens or even right out of high school.
Plumbers study areas such as:
•    Mechanical Engineering
•    Plumbing and Domestic Heating
•    Gas, Oil, Solid Fuel and Environmental Technologies
One requirement that potential Plumbers must be aware of is that, they cannot be colour blind. There are restrictions and vision assessments administered to check for this. There are also several associations that offer membership to Plumbers. They are:
•    Oil Firing Technical Association (OFTEC)
•    Chartered Institute of Plumbing and Heating Engineering (IPHE)
•    British Plumbing Employers' Council (BPEC)

Those working in the position of plumber help to ensure effective operations with regard to water and heating within and around the buildings and facilities we use everyday. These specialist craftsmen work with pipe networks, heating units and drainage systems to enable businesses, public organisations and residential facilities to meet the demands of everyday life and operations
Daily tasks generally include the installing, repairing and maintaining water, irrigation, heating and drainage pipes as well as associated equipment. The job also requires ensuring systems meet local and national regulations and working within specified guidelines.
All persons working in this field in the UK need to complete City and Guilds national vocational qualifications, levels two and three (mechanical engineering services – domestic plumbing). Training is on offer from numerous local and private colleges and an apprenticeship is an ideal form of training
Salaries for persons working as a plumber in the United Kingdom are closely correlated with years of experience. Figures on the lower end of the spectrum begin at around £13,000 per annum whilst highly experienced individuals typically earn between £20,000 and £25,000 per annum.