[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.

[danmaz74]

The main way to improve at solving tactical puzzles - and at seeing tactical opportunities/threats in games - is to develop pattern recognition for the many tactical themes there are. Training on specific themes for some time is a very powerful way to do so. I'm experimenting with this approach on BraiMax Chess and results from users are very good - I'll publish some stats as soon as I get enough data.

[pests]

> “find the best move”

Before you can do that, you need to understand the moves you can make and their implications. I think identifying forks fit here.