How to quickly master the new infrastructure?

Question

System administration

Good afternoon, comrades!
I changed my job, in a new place there are a lot of new technologies, equipment, services for me - what is the best (more efficient and faster) way to master the new infrastructure? There are basic manuals, wiki, but, of course, without real tasks / practice, everything is poorly remembered. There are also not so many real tasks, or I can’t solve them yet (minimum reaction / execution time is required) - tell me what to do?

Answer 1

Take one task - and figure it out until you can say "I understand how it works." Try to imitate it (essno separately from everything), if possible.

Answer 2

Start from the bottom. Network sockets - switches - servers - services in servers.
Do you have a network map? If not - compose, if there is - check the relevance.