These puzzles are a good place to start if you are new to variant sudoku! They can also be a fun snack if you are a more experienced solver. Most of these have grids smaller than 9x9 and shouldn’t be too difficult. If you struggle with a constraint, there are introductory puzzles for all constraints available.
If you have experience with variant sudoku you should be able to figure these ones out quite quickly. Puzzles in this difficulty range are meant to mostly be fun and enjoyable. Most puzzles from here on should have 9x9 grids, but if a smaller puzzle turns out too difficult, you will probably be able to find it here.
Things will start to get a bit more difficult from now on. Puzzles
in this difficulty range use some more advanced logic and may take some more time figuring out. Instead of thinking about constraints individually, most puzzles require you to use combinations of constraints to break in.
While there surely are way more difficult puzzles out there than the things you will find in this difficulty range, this is the highest one where I still feel comfortable setting them. I usually prefer setting approachable sudoku, but if I ever get inspired to create something hard, it will most likely end up here.