Satanism is not a "religion" by todays standards at all. It is more a way of life. Eternal living. In fact Spiritual Satanism has a similar term Sanatana Dharma(though hinduism is corrupted of course) which means the Eternal Way. This perspective might help shift how you view this path.
We've all had similar experiences to greater or lesser extremes of what you've mentioned. It shouldn't come as a shock if one looks at the state of this world where lies literally equate truths at this point. Thus to follow this path of Eternal Truth, in a world where lies have gained prominence can lead to many truths about oneself and the world to surface. Some are willing to face these, accept and go on. Others retreat where it's most comfortable. But in the end this will only delay true spiritual fulfillment, which they know they need. Also past a point skipping will literally give one the feeling of not showering for 3 month, LITERALLY. You might not be at this level yet but, at this point one can only go forward. So might as well start now, avoid the delays and focus on the path.
It's a good you know that it was wasted time and that you could have spent your time elsewhere, this is a good quality and can really propel you forward once you get a proper footing on how to manage your time and prioritize what matter most.
It's a "roller coaster" but a straight path nonetheless. The more your cup gets filled with truths(meditating, yoga, communion with the Satan and the Gods), the more the truth comes out and the dross/lies gets removed with time as well.
You can really only fill this cup by staying consistent with the practices all of which are found in the JoS. You may feel you have wasted time, but all you can really do is look back and ask yourself what you learned from those past mistakes in the last decade. Next you can dwell on the next 10 years, having a couple of spiritual goals, a daily routines, future routines, levels and what you hope to spiritually achieve as central focus this time around. Have everything else in life come around this. That is a decision that will have to inevitably get made sooner or later.