This one is for everyone like me who's in the middle of way too many series and constantly starting new ones. You know you won't finish them all this year, but you want to make some progress in a few.
I'd suggest not adding first book in a series, but you can definitely add sequel to a series you started this year. 
And do try to keep books from the same series under the same prompt (for yourself). Say, you're reading Harry Potter and you read books 2-6 in 2022. Add them all to the same prompt since it's one series you've made progress on.