If you want to practice writing, but you can’t think of any fun (or… fun-like) ways to practice writing, it may be a good idea to practice in a way that isn’t fun, instead of waiting for something fun to come along. If lack of motivation turns out to be actually problematic, then searching for a more motivating topic is a potential solution, but there are lots of other, potentially better solutions.
If you want to practice writing, but you can’t think of any fun (or… fun-like) ways to practice writing, it may be a good idea to practice in a way that isn’t fun, instead of waiting for something fun to come along. If lack of motivation turns out to be actually problematic, then searching for a more motivating topic is a potential solution, but there are lots of other, potentially better solutions.