Welcome!
To a most satisfying and useful hobby.
Things which many would consider to be a total disaster may actually turn out (Probably literally ) to be a surmountable inconvenience, or even an improvement on the original )
LOTS of help om here on a HUGE range of subjects.
My advice, FWIW, is to practice on some bits of metal, initially on the lathe (Make a few accessories.
Centre Height Gauge, Mandrel Handle, Tap Wrenches, Die Holders, Tailstock Sliding Die Holders, come to mind as possible learning projects.
They will all provide useful experience in machining, measuring and planning the operations.
You never forget having made something to find that that there is now nothing by which to hold it for the next operation!.
You will gain experience, confidence, and tools that will be useful. So a win on almost all fronts!
Harold Hall's "Model Engineer's Workshop Projects" No.39 in the Workshop Practice Series, or G H Thomas'"The Model Engineers Workshop Manual" will provide some possible projects.
You will definitely find a set of Zeus Charts a useful companion for years to come (My 1958 set are very grubby, but regularly used )
You may consider it worthwhile to add to your library
Ian Bradley's "The Amateurs Workshop", since it tells how to set up a lathe, and how to grind tools, as well as fitting techniques.
Tubal Cain's "The Model Engineers Handbook" is another very useful reference book.
These latter books will answer a lot of questions before you ask them, and save time and temper as well as material.
Far better to make mistakes on relatively cheap material rather than expensive parts of a kit.
HTH
Howard