Aromatherapy - Refresher training

Hello,

I trained in Aromatherapy (VTCT) in 2007. Following my training a practiced only on friends and family however, due to changes in circumstances, I no longer practiced after 6 months.

I would like to start practicing again and even consider selling my services however, with it being 8 years since training, I fear I'm very 'rusty', so to speak.

I'm currently researching what I need to do to pick up the skill again and not sure if I need to re-train or just carry out a refresher course. I'm also not sure if I would need to re-do my anatomy & physiology.

Any advice you are able to give me would be very useful.