grasshopper-Help for a simple half lap connection / mortise & tenon joint

Bro, there are no words to express my gratitude for your efforts and time.
Really, bro, this has been quite helpful to me. And I value your efforts. This is not repayable
can u advice from where is start learning grasshopper.
Many thanks.

Glad to be of service.

I just found a chat on advice for people starting out in GH, so I’ll write it down…Happy GH!