Welcome to the Forum!
You have mechanical aptitude from your work, so should be a fast learner.
For lathe work you will find it an advantage to do some reading.
A set of Zeus Charts will be invaluable, as an almost constant quick reference.on commkinly used thgreads, and many other things.
My 1958 one is now very grubby, but still used frequently.
The normal "bible" quoted is L H Sparey "The Amateur's Lathe" This was written when the Myford 7 Series was de rigeur for Model Engineers, but the general principles remain the same for all lathes.
Ian Bradley "The Amateurs Workshop" deals with matters that Sparey, somehow, omits, such as lathe tool grinding and setting a lathe without twist in the bed.
Harold Hall (A former Editor of M E W ) has written books on lathework (As has the current Editor, Neil Wyatt ) as well as on Milling.
David Clark, Dave Fenner (both former Editors ) and Neil Wyatt have written books on the mini lathe, should that be what you choose to buy.
You will find that books in the "Workshop Practice Series" cover a wide range of subjects in detail. Not all will apply to you, and there are about 40 of them in all.
You won't need every one, by a very long way, unless you vastly expand your repertoire.
Tubal Cain's "Model Engineers Handbook" is an excellent reference book.
Whichever you buy will provide useful and helpful information.
When you come to choose a lathe, my suggestion is to buy one a little larger than you think. Your horizons will expand, and you can do small work in a big lathe, but the other way round is more difficult.
Modern lathes will have Metric dials and Leadscrews, so for an older, Imperial, model, you will need a calculator, even if you measure in Imperial.
A digital calliper is handy because you can change from Metric to Imperial,, or back, at the touch of a button..
Last week, I thinned the heads of 10 BA bolts in a 6" centre height (12" swing ) lathe, if that is any guide!.
At the other extreme, skimming a 11" brake disc in the gap of 3 1/2 " Myford ML7 took it to its limit.
HTH
Howard
Edited By Howard Lewis on 17/11/2021 18:40:11