LF patient group to try tanking

Hello everyone,
I am currently playing the healer role but want to try tanking so that I can grow and become a better healer. Are there any helpful players out there that are patient and willing to group up with me and give me pointers on tanking? I would try pugging but would rather not slow a group down or frustrate anyone with my mistakes. I’m in a friendly/casual FC but sometimes our hours do not match up well enough. If you are interested in helping me out I would greatly appreciate it!