Please tell me it is all fake! This is hilarious! I mean, come on, this is 2021! Noobs please go and use Ethereum, EOS, Tezos, Polkadot, whatever you like.
Leave us bitcoin, for god's sake! It is not for you
Just start reading.
Of course, much depends on your focus: are you looking for developer information, user information, news, discussions, trading info (in my opinion, a bad idea, better to just buy and wait) or something else?
And whatever you do, if you have a private key, never share it with anyone. Likewise, there will be people wanting to get people involved in what are likely Ponzi schemes - if it sounds too good to be true, it probably is.
As my grandmother used to say "free cheese only in a mousetrap". Although she has hardly ever been an investor or visited this forum
https://bitcointalksearch.org/topic/guides-on-bitcointalk-index-thread-until-there-is-a-dedicated-subforum-4928968
The guides related to bitcoin, even when a bit outdated, are still great!