welcome. there are a few starting points for all these devices singly, and together. the official docs have pages on each of them, and are highly recommended, as they provide excellent starting points to see what these devices can do, and how to use them.
the grid can be used directly connected to your computer, or to ansible (and even teletype). if connected directly to your computer or DAW, you can use it to control max4live devices, standalone max apps, and various programs written in all sorts of languages. sequencers, synthesizers, granular processors, loopers, samplers, and more.
when connected to ansible, the grid becomes the controller for one of three sequencer apps on ansible: kria, meadowphysics, and earthsea. these apps can also interact with, and be controlled from, teletype scripts.
ansible can also be used as a simple midi-cv converter module, for a usb midi controller. when attached to teletype, ansible can be used as a cv/gate output expander for teletype.
teletype is probably the most complex of the bunch. it has excellent docs, as well as several incremental studies that walk the user through what teletype can do, and teach concepts for writing one’s own scripts. there are also several premade teletype scenes available for viewing, to get an idea for the kinds of things that teletype can do, as well as its simple scripting syntax. teletype scripts can also control ansible apps, when the two modules are linked by an i2c cable. there’s also the full teletype manual as a reference for all commands, operators, variables, etc.
beyond all this, there’s a wealth of information and Q+A available here on the forum via the search function; just depends on what you’re looking to do or learn.