I've been doing this a long time, here's my take for what it's worth.
I started my training under the BMAA syllabus, so it was essentially derived from the microlight syllabus but with differentiation to suit a paraglider type wing environment.
I wasn't interested in learning to paraglide, I just wanted motorised flight so it suited me fine. If you want to just fly PPG then got to a trainer that offers direct PPG training, such as Paramotor Training (here), CMParamotors or UKPPG.
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