Here is an unusual poetic form to try: OULIPO
OULIPO poetry is written using unique forms of mathematical and textual structural constraints.
It began in the 1960s with the work of French mathematician Francois de Lionnais and writer Raymond Queneau. OULIPO is an acronym of Ouvroir de Litterature Potentielle(OULIPO), or Workshop of Potential Literature.
There are many forms but ‘[o]ne of the most popular OULIPO formulas is “N+7,” in which the writer takes a poem [or piece of prose if you want to vary it] already in existence and substitutes each of the poem’s substantive nouns with the noun appearing seven nouns away in the dictionary. Care is taken to ensure that the substitution is not just a compound derivative of the original, or shares a similar root, but a wholly different word. Results can vary widely depending on the version of the dictionary one uses.’ (Poets.org, 2004)
‘Another OULIPO exercise uses the “snowball” technique, where the first line is one word long, the second line has two words, and so on. A snowball poem can also be made up of lines comprised of progressively longer words, in which two lines might read:
I am far from happy Mother reduced
A no-fly zone using yellow ribbons.’ (Poets.org, 2004)
You can find out more about it here: https://poets.org/text/brief-guide-oulipo
Guardian article on OULIPO: https://www.theguardian.com/books/booksblog/2013/jul/12/oulipo-freeing-literature-tightening-rules
I recently tried it to good effect.