Jane Lynch -- If You Want Marriage Advice ... I Got Nuthin'!

When it comes to Jane Lynch and marriage ... she wants you to know the doctor is NOT in -- and yes, you can take that a couple of different ways.

We caught up with Jane outside her usual spot ... Kings Road Cafe, where she was chilling with Matt Sorum -- the Velvet Revolver drummer and soon-to-be groom -- and we've never seen her laugh this hard.

Jane absolutely busted up when we asked if she was giving Matt tips on achieving marital bliss. Her response is hysterical ... and maybe a little sad.

TMZ broke the story ... the "Glee" star is divorcing her wife, Dr. Lara Embry -- though she seems totally chill with the sitch in this clip.