Spiritual stages are different for every seeker depending upon Poorbali (previous life) and this life's (at the moment) Kamai. Sangat is very important to elevate one's Avastha. Jeevan of established GurSikhs like Bhai Sahib Bhai Randhir Singh Jee and others give us great inspiration to setup our milestones in achieving higher and higher Avastha in mystic Gurmat world.
One can start with small 365 days milestones formula to check if we are on correct path or not.
Check 1: At least three hours of consistent Amritvela starting from 2-3am, although for whole life but at least for 365 days.
Check 2: Once check 1 is accomplished then increase amount by an hour(s) consistently for another 365 days.
Check 3: Once check 2 is accomplished then Increase Amritvela hours to all day long that is while doing other worldly tasks Naam Abhiyaas continue uninterruptedly from 2-3am till go to bed at 9:00pm. Again consistently for another 365.
Achieving above milestones may take this life time or another or more but if someone have had this kirpa in this life time within few years then proceed to next one. This one sounds tough but easier if above one is achieved.
Check 4: Next milestone would be to have Naam Abhiyaas while asleep, check again for consistency of at least 365 days.
Alongside one must watch Rehat Rehni strictly especially Roti-Beti Di Saanjh with GurSikhs. One will find jewels along the way and billboard signs for next stages which doesn't require someone's description.
Of course, without HIS Nadro Karam above is not possible so two times Ardaas is a must.
This is what Daas learned from Sangat of Gursikhs; however, myself is still at pre-check era.