Hello, i just picked up my first lathe , It is a small 7x14 real bull metal lathe . Excited to start learning.

So far i picked up the A2z tooling kit from littlemachineshop.It includes

-Quick change tool post with 2 turniing holders , boring holder and a cut off holder
-1/2" drill chuck and short arbor
-boring bar set
-parting blade
-set of indexable turning tools includes 5 tools (TAR, TAL, TBR, TBL, TE), inserts, a wrench, and extra screws.
-4 center drills

I also bought seperate
-Mt2 3 bearing live center
-dial indicator with magnetic stand
-thread gauges
-internal threading bar(not indexable)
-cheap threading bar (not indexable)

stuff i already have
115 pieces HSS dril bit set
various digital and analog calipers
cheap HF turning bars
a bunch of aluminum and delring bar stock for practicing

Can you tell me what else i will need. Can i do threading with the stuff i have? I wanted to get another indexable threading bar but they were like 85.00 from lms . Can i get one cheaper somewhere. I really want to learn how to turn threads. Also will i need a special tool holder for threading to fit the qctp or can i use like the turning holders? Also i would like to get a cheap knurling tool that works and eventually a 4jaw chuck. Please let me know of anything else i may need to get started .Thanks