Have you read the book "The words of my Perfect Teacher", by Patrul Rinpoche? It's a very good guide to Ngöndro in general.
I also suggest "A Guide to The words of my Perfect Teacher", by Khenpo Ngawang Pelzang.
Before plunging into Ngöndro, especially if you deal with faith related purposes, it's important to have some theoretical background to boost one's confidence. This theoretical background should encompass not only the practice of Ngöndro, but Buddhadharma in general. It helps to have the Four Noble Truths well studied and by this I don't mean just knowing them, but having at least some intellectual understanding of them by means of contemplation. One should clarify some of those more nagging doubts with one's teacher (or by oneself).
Then, spending some time contemplating (thinking carefully about) the four thoughts that turn the mind to the Dharma is usually beneficial. Probably you have noticed that the practice of Ngöndro is very well structured and usually the last step prepares the following. Maybe you could spend some time (perhaps a few weeks), thinking carefully about each individual part of the whole practice and then relating them with each other.
There's a good book you can request online by Dzongsar Khyentse Rinpoche to help you in your practice (it's the Longchen Nyingtik Practice Manual).
You can do so here:
https://app.etapestry.com/hosted/Khyent ... eForm.html
You may as well request the others, if you feel interested. They are all good.
Take it easy, don't force yourself and practice out of understanding, not just will power. There will be better times and terrible times, but as long as you know what you are doing a strong will will arise and you will end it. It's assured. However, if you do it by the sheer power of will, it won't matter if you end it or not as it will be pretty much pointless.
Still, notice what I wrote before. There are other ways and you are free to check them, especially if you don't have a lot of time available. Don't let anyone tell you otherwise. Still, the traditional ngöndro is a wonderful practice as long as it doesn't become a hindrance to your progress.
Best wishes, friend!



