[dfan]

I enthusiastically recommend Chess Tempo (https://chesstempo.com/), which will give you interactive chess puzzles from real games that are tailored to your level. Someone else mentioned the similar system on lichess, which is also fine.

[EduardoBautista]

And if you are missing forks, you can choose to filter for only fork puzzles.

[Someone]

If I know a problem is “find the fork”, im in a complete different mindset from “find the best move”.

Because of that I doubt doing problems of the former kind will help seeing forks much when going back to “find the best move” type problems.