I'm unsure as to whether or not to include a comma within the two sentences outlined below (I've bolded the specific sections). In the first sentence, I have a feeling a dash might be more appropriate. Your help is most appreciated.
While challenging, this experience provided me with valuable insight into the strengths and needs inherent to this group and the importance of creating a community that is accessible and accommodating**,** irregardless of age or ability.
Using the skills I learned here, I later embarked on a position working for The Hospital of Sick Children**,** where from 2016-2017**,** I worked as a nursing aid.