We encourage all apprentices to keep learning, however, wherever you can, it makes sense to focus on successful completion of your apprenticeship first.
In the first instance, you can talk to your line manager about your options. Many employers (particularly the larger ones) may have online staff training easily available. This could be a good time to focus on gaining new skills and your apprenticeship provider may also be able to provide a potential source of options. Courses which are free, or involve self-directed study, may be an option – a YouTube search will provide you with lots of surprising and useful ideas.