As far as timelines - the last time we saw the original timeline (Next Generation, Deep Space 9, etc.) was the last episode of Enterprise. The "prime" timeline that the Leonard Nimoy Spock came forward from in the first JJ Abrahms movie, and that the new shows take place in is not that same timeline as the shows and movies before it (as much as the creators want you to believe it is). This is due to a licensing issue stemming from when Viacom split with Paramount. The movies and shows are forced to make everything in their content a certain percentage different from the original shows because none of them have the original license. So, no.. the Picard in the in the Picard series is technically from a different universe (with the helping to save the Romulans etc.) than the Picard we all grew up with.
Discussed in more detail here
More recently things are now back in a position where they can revive the original license and start using the original continuity, but Paramount is still stuck in the contracts with Bad Robot who has the alternate license for the time being. Star Trek is technically a multiverse even when ignoring the kelvin timeline.