reply to u/Ripraz at tk
I analogize typewriters to cars: there really isn't a "beginner friendly" option, they're all just cars or typewriters. This being said, how well built and engineered they are and some of the smaller optional features or "trim lines" can differ a fair amount. With typewriters, one of the biggest trim differences is the tabulator (does it have one and how do the controls work? If you're a screen writer, you really want one, but if you're doing other general writing, you can get away without one typically.)
With Olivetti, you're probably going to find peak typewriter manufacturing and materials from the 1930s into the early 1970s. The best stuff is likely in the 50s and 60s where their design chops are also the strongest. Their stuff in the mid-70s and after becomes more plastic and isn't as solid (eg. Lettera 35).
https://typewriterdatabase.com/olivetti.56.typewriter-serial-number-database
Some suggestions: <br /> Standards: Graphica, Linea 88<br /> Portables: Studio 42, 44, 45; Lettera 22, Lettera 32
Be sure to take a peek at the individual typewriter galleries and individual machines in the database to see the shifts in design over time, if that interests you.
This comparison/review on YouTube, of which there are surely others, is pretty solid: https://www.youtube.com/watch?v=tW6Ji275FdE
As a beginner, you might appreciate skimming through Dr. Polt's book before or after buying a machine:<br /> Polt, Richard. 2015. The Typewriter Revolution: A Typist’s Companion for the 21st Century. 1st ed. Woodstock, VT: Countryman Press.