OneMoreScore
im sorta addicted to genshin as for stoping myself when buying i usually just play the character over and over again in trail or watch videos of till i grow bored of it. but ya there isnt anything wrong with spending money on a hobby just keep a allowance on it save up that allowance for when u wanna go big.
Now for games? Maybe try out FGO ? I mean you clearly like it so hey it will be interesting and really , I am gonna be honest , I do want to see you writing about nasuverse in the story also I really would like MC to go to Marvel because the MC so far has been going to low tech worlds only , that is not even to mention all the sweet thing you can loot in there also . I would also like MC to go to Harry Potter because loot or Naruto again because of great old loot. Do keep in mind that all of this is just a suggestion and this is your story so choose what you like at the end of the day because really this is your story and so far you have been doing an excellent job so I trust your judgment although I would definetly like MC to loot more like he did in One Piece because loot is life , loot is love
I say go for it and yeah , adventure time does sound like a good idea , what with all the loot however in my opinion and you do not have to follow it because this is your story , I think you should hold of on that at least until your MC is a bit more stronger because Adventure time world is mad scary