Career in Planning

Hello - Ive been working on a rail industry based project for the last 6 years as a materials controller - I went on a 3 days Primavera P5 course in December and now would like to find a planning job to work on but most jobs require experience in planning. So how do I start ? (I have been using Primavera at work to keep me up to speed with what I learnt but unfortunately not on the project itself ) can anyone help ?

I currently live in Central London

Thankyou