M.P.
I suggest you include any training you've had, to include research and reading as related to special needs without mentioning your son. Let them ask about this during an interview. But only if your skills will be an advantage to the job for which you're applying.
Law does not allow asking applicant questions about family Or personal life. As you suggested having a special needs child may be considered a negative which could influence their decision. If it does influence them they are not allowed to mention it.
I don't if describing your learning would be opening the door to allow them to ask. I am not familiar with current law so suggest you talk with a lawyer or someone in Human Resources. I think I would not put anything related to your son on a resume. I would only mention specific skills and not include how you came to acquire them.