Most parties run training courses on subjects such as election law and procedures, public speaking and personal presentation.
With experience, you could move on to become a party 'whip' (ensuring that fellow members follow party policy) or a spokesperson on a particular subject.
If your party is in government you could become a junior minister or cabinet member.
You could lose your job at any election, but if you do, you will probably be able to use your contacts to find a related job, perhaps in the media or as a business consultant.
Each parliament deals with different issues. These are summarised below.
The Scottish Parliament passes laws on domestic matters including health, education, housing, transport, local government, justice, agriculture and fisheries, the environment and economic development.
The UK Parliament passes laws on matters such as defence, taxation, welfare benefits, energy and immigration, as well as domestic affairs for England and sometimes Wales. It also has responsibility for UK foreign policy.
You can find a list of Scottish Political Parties below.