Don't worry. Take someone with you and speak to other cocker owners.
I don't show at all now but remember at my very first ringcraft Palacecraig, Lenoxgrove, Wiljana and Shanaz all had young pups there and all were very helpful. It's just me that was useless. Ha,ha. Someone will show you the ropes. Remember your show lead, treats and slicker.
There were no cocker owners at my ringcraft class so we didn't get a lot of advice on stacking etc.
To the OP, the people who run the ringcraft will let you know what you need to do. It's basically walking up and down, triangle, walking round, stacking on the floor and then on the table where someone will go over your dog. Along with touching mouth, body etc, get Finlay used to having his balls felt.
I didn't take treats with me as found that was the worst thing to do with Quinn as he would get far too excited about them.
Good luck and enjoy.
ETA - incase you're wondering why we went to ringcraft, we was planning on showing and he went to two shows but we don't show now - Quinn didn't like the showing after all.