If i were to recommend a game for people with lower skill, i'd say fangames Riverbed Soul Saver, Frantically Forbidden Fruit, and Shining Shooting Star. The first is generous with resources and the Liberation mechanic makes the game a breeze, the second's Juice mechanic (power-ups and health) makes things all-around easier, and the third has a diminute hitbox and a rather share of resources. Len'en Reactivate Majestic Imperial, personally i find it easier that the first two games (switching shottypes, flash bombs, some characters, mostly Sukune+Yaorochi have good passive skills), Brilliant Pagoda or Haze Castle's upgrade system trivializes the game at higher levels.
If you want a mainline Touhou game, use Legacy of Lunatic Kingdom's pointdevise mode.