Welcome! I don’t have any specific threads to point you toward but I can say the search function is always fruitful for me. Just about every question I’ve ever had has already been answered by many people in many ways. Just gotta read. Also I find Elektron’s manuals to be very comprehensive and consulting them frequently usually helps.
Welcome! People are pretty friendly and helpful here. It’s not so organized though (as in, there is no FAQ or structured intros). While the search function is quite useful, be careful about older threads where people are complaining about issues or proposing elaborate workarounds for things that were fixed in later firmware upgrades. Elektron has been pretty good about updates, so newer threads are more reliable.
So many questions have really good answers here already, so always start with some searching. In the case you can’t find an answer, there are many kind and knowledgeable people here, especially if you ask your questions clearly.
There are always the manuals on elektron.se if you want to get familiar with what the machines are capable of doing.
As far as getting along with it, just friendly advice.
The A4 especially has a love/hate relationship to it, many fluctuating between sessions with the gear.
One day people will be like “not enough sweet spots” to “OMG! This is the deepest synth I’ve ever used!”
So start slow with it. Take a moment before jumping right into patch creation and take a lovely autumn stroll down the premade patterns, then kits, then sounds. Make your first few sessions with the synth as enjoyable as possible before getting down and dirty with the sound design of it.
Don’t buy another thing till you are really comfortable with Elektron workflow
Actually, I would start with AR only, it’s easier to get used to the sequencer, switching from Grid Mode to Live Mode.
In Live Mode, learn to turn knobs to introduce variations and sculpt your loops (you’ll be doing parameter locks aka plocks this way)
In grid mode, hold a trig and tweak the values (plocks again)
I save all my favorite patches (Sounds in Elektron speech) in Bank P so that I can load the whole Bank in the sound pool, rendering such sounds available for sound locks (hold trig, turn level knob)
You have to understand precisely the relationship between Patterns and Kits. There are Tabula Rasa projects somewhere to start with a 1/1 relationship between Kits and Patterns (links bellow)
Take the time to understand how things are saved. A Sound in a Bank is indépendant from any project btw.
In a default project, when improvising, my most used move is: save current Kit, copy pattern, hold change pattern and paste, jump to new pattern, save Kit as new.