All documents will be operator specific, which is why they aren't published on the net. The FCOMs and FCTM will be produced by Airbus for the individual operator and will incorporate their SOPs. Some companies will be very standard Airbus, others not. The danger of using manuals you found on the net is that you may pick up bad habits. I would advise you to wait until your on the course - you will have enough time to study. One document which is available on like is the A320 Systems Briefing for Pilots which is designed as a pre course overview and will help. If I were you, I'd stick to this.