Welcome to the forum! If you have any questions feel free to ask me or if they involve server issues contact one of the staff! Trust me they are really kind and will help you whenever they get the chance, just be patient as they can be busy often though.
Open the Minecraft launcher; Click 'Edit Profile'; Look for: 'Use version: release 1.9.2'.; Click the 'release 1.9.2' part and change it to 1.8.9. Hope this helped! Welcome!
