This is what I did to start Lakeland 3 Gun in Cold Lake and Bonnyville, Alberta.
I joined both clubs (CLF&G and BSSA).
I then started going to the monthly meetings at both clubs.
I began floating the idea of 3 gun at both clubs meetings. I brought info and a general rule set and target and club requirement sheet to hand out to both clubs executives.
I contacted the Alberta CFO for what was required to shoot 3 gun at these clubs.
Presented my findings from the CFO to the clubs.
The clubs voted on my motion to bring 3 gun to the clubs. Both voted in favour.
I contacted WRAS here in Alberta for guidance on matches, etc.
I got together with the IPSC rep at the one club and asked to share props and targets as to not cost the club a fortune to get it started.
I then wrote up a rule book, and a safety brief and presented it to both clubs.
I requested a date to put on a "demonstration match" for the executives to observe and ask questions and become familiar with what I was trying to accomplish.
I gathered 8 fellow 3 gunners (didn't want too many participants for the demonstration) and fully briefed them on the plan.
I put on a "demonstration match".
I answered all the executive questions that arose.
Once the sport was approved, I requested range time (once a month on Saturdays) to proceed with club level matches for club members.
We then got an e-mail address so people could contact us and we could contact them with news / events.
I ran a match once a month for a season (last year) while periodically the executive came out to watch us.
After a few matches the executive was happy and let us do our thing within the law and club rules.
I then contacted WRAS again (for last August match) to run an open to anyone match and invited the executive to observe it.
The executive was impressed with the match and even put on a BBQ for us afterwards.
At CLF&G, I ran for Vice President of the club and was elected.
There, I have lobbied for 3 gun since being there.
Our executive successfully lobbied the city of Cold Lake for support.
This year, CLF&G has constructed 3 new "action shooting bays" including a 25m, 50m and 100m.
We are now in the process of CFO inspection and will be working to get these certified in the near future.
My plan is to start holding 3 gun matches at CLF&G as soon as we are certified to do so.
This process has taken 2.5 years to get sorted out and we now have approximately 15-20 regular competitors and plan to collaborate with WRAS again this year for a larger, open to everyone, match again this coming year.
Hope this helps.
Edited to add: Clubs are run by those that show up. Show up, bring a pile of like minded friends and the direction of your club will be up to you.