Just downgraded to 9.2 and was wondering what I should do now

Hi, I just downgraded to 9.2 and was wondering what advantages would I get from installing a CFW on my 3DS XL (old) and which CFW you believe is to be the best CFW to install. I was also wondering if there was a way to access the eshop channel without CFW (I heard that you NEED a CFW to access eshop).
Thank you for your help!
(sorry if my english is bad)

-Duckling