"funny" in German has quite a few but "komisch" is the most fitting. Also: lustig, drollig. Note that lustig also means merry. See link below.
not (funny) ---> nicht (lustig)
funny things = lustige Sachen; komische Sachen
English: "interesting" is German: "interessant".
zu witzig zu komisch
lustig = funny in German
wie ist das lustig is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
das ist so lustig is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
Today was funny = es war lustig heute; heute war ein lustiger Tag.
you say witzbold to someone, who is really funny
Ich bin fünfzehn, und ich bin sehr witzig.
funny
Sie sind lustig