Aditya
Let me try to explain something that may help - it's a point I think even some more experienced practitioners may miss.
As Yogani stresses again and again, meditation is all you need, and the rest is just gravy (though darned tasty gravy). So AYP isn't a "course". You don't have to get to the later lessons, you don't have to "work thru the book" to get to the end (of yoga). You do need to add practices in the proper sequence insofar as you choose to add on, but all practices aside from meditation are strictly optional. Bearing that in mind should dramatically change your outlook on self pacing. It's not just optional when to add a new practice...it's optional WHETHER to add a new practice.
You ask about "next step". The AYP practices aren't a series of steps. The whole system is nothing more than a toolbox. The "steps" happen within you. You could be doing every single practice taught by AYP with limited results. Or you could be doing meditation to the point of complete realization. Use and choose your tools wisely, and in no hurry. If you have lots of bhakti and crave enlightenment with vast unquenchable thirst, and this creates an attitude of hurry, that's cool. But if you're in a hurry to complete a sculpture, the notion that you must work as fast and thoroughly as possible through a set of chisels would be silly. Same here.
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So when you start your first practice - meditation - settle in for long haul. Don't immediately start watching for an internal cue to move on to other things. Just do it, milk it, plunge into it. At a certain point you may or may not feel an urge to step on the gas - by which I don't mean two or three meditation sessions that "don't go anywhere", and I don't mean a nervous, striving feeling of wanting more "results". And if you get such mileage out of meditation (or whatever set of practices you're doing at a given point) that you miss that point, by weeks or months or even years, it's ok. Meditation (plus whatever else you've chosen to add on) is all you need, baby. You're good.
But when your practice is stable and your "real life" feels relatively smooth and you feel like you've made your practice your own and the stew needs some spice, add the next tool. When in doubt, don't. And if the doubt lasts a long time, even forever, don't sweat it.
Caveat: meditation's all you need, but spinal breathing's nearly essential to add, and probably ought to come soon after meditation. And, gosh, samyama's awfully nice. And sambhavi and mulha banda are incredibly helpful. And asana helps melt your coarse blocks. Etc. etc. through the toolbox. All these things are non-essential, but awfully nice. But meditation's nicer.
Does that help?