Q: Provided I strictly follow the condition of the first restriction, how many years will it take me to at least get a feel of the Upper World?
A: The minute you can perform the first restriction of the desires you are given and not use anything for yourself, but for the Creator, you will feel the Creator and the Upper World, according to the strength of the restriction you performed and the number of desires that were corrected on that restriction.
If you can later on turn your previous corporeal aim from reception for yourself to spiritual aims of reception for the Creator, you will perform spiritual acts with those desires. You will take control, instead of being guided by the Creator.