Incredibly difficult. Lose items if your character blacks out. Must make it a priority to buy item slots and find items wherever you go.
Longest Pokemon story ever, and thats not including Shiny Hunting (which Shiny Pokemon appearing in overworld like Lets Go. End goal is obviously to catch Arceus, but main insider that is leaking info says they seriously wonder how many will actually make it to the end.
There are rumors about Primal Forms for Sinnoh Legendary Trio, but it is not concrete confirmed. Same for a possible counterpart to Raichu.
There are said to be seventeen Pokemon getting Hisuian Forms: Zorua, Zoroark, Growlithe, Arcanine, Braivary, Delcidueye, Typhlosion, Samuratt, Gomey, Goodra, Avalugg, Qwilfish, Sneasel, Basculi, Voltorb, Electrode, and Lilligant. A few of those are not confirmed, but it has been leaked by knowledgeable source.
Seven new Pokemon: Stantler Evolution, Scyther Evolution, Basculin Evolution, Sneasel Evolution, Qwilfish Evolution, Ursaring Evolution, and adding fourth Genie Weather Legend to Landorus Tornadus and Thundurus.