If you have specific questions you'd like to ask you can always ask them here or in #live2d-help-chat . However if you are looking for someone to provide vc/personal lessons you should probably make a post in #live2d-buying for a teacher
Alternatively if there is a rig tech that you really like their work, you can always dm and ask if they offer lessons and what the cost would be
Usually I'd say lessons don't necessarily make sense unless you just have money to burn and really want one on one, but since there's a group of you it may end up being cost effective if you all pitch in on the cost