There's a good section on making/modifying your own glassware for a home laboratory in the book Granddad's Wonderful Book of Chemistry by Kurt Saxon isbn 0-9602258-0-6. It's mostly reprints from home hobby magazines from the late 1800's and early 1900's. The part on glass blowing is a reprint of ELEMENTS OF GLASS-BLOWING by H. P. Waran M.A., PH.D.(Cantab.), F.INST.P. originally published in 1923 in London by G. Bell and Sons Ltd. It's only 34 pages long, and most is on modifying existing glass tubing to bend it, taper it, flair it, or even bend/roll it into cooling coils. And all geared towards setting up your own lab at home.
But many of Kurt Saxon's books are on those ... banned books ... lists in numerous countries. Ever since he got the book rights and republished The Anarchist Cookbook, those guv types hate him (altho the info in that book is generally more dangerous to the person following the recipes than it is to anybody else). The info he published was common knowlege and freely published and used in the early 1900's. But now some of that info MIGHT be ... misused. So they have banned some or all of his books.
You might be able to find an original copy of that pamphlet. It would still require a bunch of work/experimentation to develope any skill at modifying glass tubing. But it might be a start.
I have my doubts about getting enough "training" through an "art class" in glass blowing for your job. But you might investigate any medical/laboratory tech type classes. Or ask a researcher at a nearby college/university about who makes up their specialty glass wear in the lab. And then talk with that company about how/where to learn the trade.
Mikey - that grumpy ol' German blacksmith out in the Hinterlands