Data labelling and cleaning IMO is some of the hardest/most time consuming process for it. If you’re nifty with JS or C++, (or any other app based program) you could write a quick mini-app that goes through a directory of images and you could select a few labels for it.
Something like so: machine learning - Tool to label images for classification - Data Science Stack Exchange
Or labelbox.io
I’ll add though this won’t be a fun process, but data labeling (for the most part) never is.
I’ll add though that the start of this thread was on NLP labeling, not image labeling