A pair of parallettes will allow you to take advantage of the strength training benefits of a gymnast. The key benefit to using parallettes for body-weight strength training is that you are elevated off the ground, which allows for a deeper range of motion during many common movements. There are a multitude of exercises that you can perform with varying degrees of difficulty. Here are a few basic drills that you can play around with; most of all go out there and have some fun!
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Here are a few good channels that can help you develop great parallette skills:
GMB Posse at https://www.youtube.com/channel/UC_ruB7qtdk4KufASPRuWhZA
Calisthenicmovement has a few good beginner and intermediate exercises:
Expert village has a few cool tutorials as well if you have the patience to search.