Your smoking tek doesn't seem to be that off.
But I also didn't see any mention on the dosage so it can be that maybe.
Besides that, maybe it's is the magical 3rd hit that is lacking.
1st attempt for SWIM's cat twice removed was tried in a wooden VG too, also was low on the dosage.
Didn't get to breakthrough then.
It took a few trial runs but SWIM's cat twice removed eventually got there, and my best advice would be just that.
Trial and error. Just focus on getting used to the smoking tek and you should be fine.
Nowadays, SWIM's cat twice removed uses a glass water pipe with Changa.
2 good inhale and exhales of those and it's bye bye reality howdy hyperspace.
If SWIM remembers correctly the proper tek is to take slow and steady, only enough to be able to hold for 10-15 secs.
Don't char just brush the fire slightly over and watch things bubble. (Not applicable for VGs)
By the 2nd or 3rd time, it should become easy to forget that you hold the port key.
Have a proper flat surface ready for emergency landing within arms length.
Hope this helps and best of luck.
The most merciful thing in the world... is the inability of the human mind to correlate all its contents.
~H. P. Lovecraft~