If you have the opportunity to receive some on the job training you should grab it with both hands. Although you may feel that you are not ready to do any further studying or exams, on the job training can be complete different to studying at school or university. One of the main benefits is that you are often still paid your usual salary so have the opportunity to learn or advance a skill whilst not having to be concerned about how you are going to cope financially.
Training on the job can help further your career, not only will you have another qualification to add to your CV, your current employer may offer you a promotion once you have completed the training. Participating in extra training shows not only commitment to the company but also to self-development which is something employers look very highly on. You may be required to sign a contract stating that you will stay within the company for a certain amount of time after completing the course. Always check if there are any special conditions or costs that you may be responsible for before agreeing to the training.