բարեւ Ձեզ (barev dzez) Nick and welcome to Epic Ski!
I see there is only one ski resort in Armenia on Mount Teghenis near the town of Tsaghkadzor and they do offer ski instruction on an hourly basis. The first thing that comes to my mind after this tiny bit of research is that things are going to be different in Armenia than they are in the US. So the common advice here to only get professional instruction instead of instruction from friends and others who don't teach on a regular basis probably needs to be watered down a bit. My first question to the ski club guy would be what experience do they have teaching new skiers? My second question would be what the safety plan is.
We do have a few resorts in the US who incorporate some indoor time into teaching beginners to ski. Most resorts can get most never evers to ski their first run within 1-4 hours without any indoor time. A lot depends on the layout of the mountain. It's hard to tell what is available for sure, but it looks like first timers will use a rope tow starting at the main lodge (but one needs to ride a lift to get to the main lodge?). My first suggestion is to review the suggested logistics for first timers in great detail.
You have not mentioned whether this will be a club activity (where fun should be the priority) or a physical education type course activity (should skill development and exercise ever be a higher priority than fun?) for the university. As a club activity, 4-6 lessons should be fine. As a course activity you could easily go to a 9-10 week program to match up with a school calendar. My resort used to run a 6 pack lesson program. We had quite a few people go through that program starting with no experience. While most people stayed in the same class group from week to week advancing at the same rate from level to level, some people did progress to higher levels faster. You need to match up how many people you will have in this program versus how many instructors they have available. Can we assume we are talking about young adults in the 18-21 age group? Teaching people of different abilities in the same group is (cough) "a challenge". If there are limited instructors and different groups of abilities it may be possible to teach the lesser skilled ones first for 2 hours, then let them practice on their own while the more advanced ones are taught.
In the US, many resorts have modern gear for rent to beginners that allows for varying instructional approaches. One of those approaches is teaching beginners parallel from day one. I doubt that is going to be an option for you. If the gear is as I suspect, and the instruction is as I suspect, my guess is that the odds of being able to parallel ski in the first season is less than 10% and the odds of getting there after 2 lessons is more like .1%. Getting people to make parallel finishes to their turns after the third lesson is probably doable. And if "gates" means bamboo (or better yet the equivalent of brushie - e.g. a tennis ball cut in half) set in an easier than Nastar layout on an easier than Nastar slope, then that too is doable for a fourth lesson and having a competition for a fifth lesson sounds like fun. My preference though would be for a more US typical "level" offering of lessons where
1) first time - learn about the gear, how to walk around on the flats, straight run, wedge, turn right and left, stop and ride the lift
2) focus on fixing problems with right or left turns and linking turns
3) increase speed of linked turns and wedge christie (parallel finish)
4) increase pitch of slope and match skis earlier in the turn
5) parallel turns
Note that most skiers will need repeat lessons at the higher levels. The idea is that people progress through these levels at their own rates.