Go for the films any time you like. The (unsaid) premise is that The Motion Picture takes place about two years after the end of Kirk's five year mission. The Enterprise has been rebuilt to 1979 standards and it's all about Kirk and Spock finding themselves. Also includes a very attractive bald woman.
The Wrath of Khan takes place a good few years later, after Kirk has (likely) completed another 5 year mission and once again been booted upstairs (don't ask). Anyhow, it's a great movie. 3 and 4 complete a trilogy which 2 begins.
We don't talk about 5.
6 is superb and completes (or does it?) the story of Kirk and his crew.
You'll need to watch all 7 seasons of The Next Generation before graduating to movies 7-10.
By the way, the Director's edition (Robert Wise no less) of The Motion Picture has just been restored to 4K. If you have Paramount Plus, fill your boots.
Anyway, hope you like them!
Nic. (Deputising for Joe as it's still early over there).