>>96343105
That all depends entirely on what you need to get back into the game. Do you need a simple-to-pilot deck that can get you accustomed to how newer decks function? Do you need to catch up on all the different summoning mechanics since the 5Ds era?
If it helps with the card density at all, most proper archetypes will generally share activation conditions and/or effects between their members. Most Kashtira monsters generally share the same summoning conditions and types of removal, most low-level Witchcrafter monsters share the effect to tribute themselves on quick effect to summon another, most Tearlaments monsters share the effect to Fusion Summon when they're sent to the GY by card effect and also mill, so on and so forth.
So it's less about asking "what do each of these individual cards do?" and "what does this group of cards do, and which ones should I identify as the chokepoints for interrupts?" Also, skimming the text to see if there's quick effect interruption. Though granted, the new set is dense in a lot of effects that I admittedly experience picrel while reading.