Many courses are available to explore the world of computing even further e.g. using word processors such as Word, spreadsheets such as Excel and many more things. Some are online, some in training centres. Subject to certain criteria, charges may apply. As always, we have not been able to assess these courses thoroughly so you should investigate whether they are suitable before taking them up.
Potential4Skills is an organisation mainly aimed at providing basic IT skills to the unemployed and improving the skills of those who are employed. However, the courses are also suitable for those who wish to achieve greater use of their computer skills. The list of courses and centres can be found at http://www.potential4skills.co.uk/