Sure you can, but it depends on what makes a ritual/practice/meditation 'potent' for you.
Anyone can START. A very renowned magician once said LBRP is one of the essential rituals, a lifetime work and the more one studies and practices, the more one finds in it and gets out of it.
I have been practicing this ritual on and off for over 30 years. For extended times, 2 x day. Nowadays, I do it occasionally and these one offs seem incredibly potent ... but that came after a few years of woking with it.
Anyone who devotes some posative time and attention to this will greatly benefiet - IMO.
You can do it, without any training but the training and extra knowledge associated with it (eg, visulisation, control of breath, word vibration, etc) holds the key to its potency
There are a few threads on the LBRP in the Thoth and G.D. Hermetic (part of Thoth) forums.