Well a harrier and viper is a capable tool for the job , not sure about the 40 yards zero but if it works for you then thats fine .
I used to go to Bisley and as much as I love the place don't think it's the best place to go as a newbie , then again you will have lots of knowledge there if they chose to share it with you . lol
Loads of clubs around , be sure to tell them you are new to the sport as that way you can team up with a seasoned shooter to show you the ropes. Its also worth going to the various comps around the country , they are not as serious as you might think and the banter is second to none .
Enjoy , I'm sure you will