What are some essential or useful applications for a new smartphone user?

 
I have recently switched from a flip phone to a LG Aristo smartphone, which is much more advanced and has many features. I am not very familiar with the technology and I would like to know what are some applications that I can download and use to make the most of my phone. I mainly use it for texting, but I am interested in exploring other functions and possibilities. My son is not very patient with teaching me about tech, so I would appreciate some guidance from an expert.

 
Thank you for your help.
 
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