Although TuHS no longer has a Newsela PRO subscription, there are still many things you can do with the free version of Newsela. You still have access to the current events articles at all reading levels, and you can still create assignments for students. You won't have all the same data and progress tools, but for a leveled current events reading source, Newsela is still a great choice.
Pretty much every tutorial you need to use Newsela is available at the Educator Center link above - how to manage student accounts, how to assign articles, how to review student work, and more.
There are loads of how to videos here, a few of which we'll link below. Some of the features described in the tutorials require a Newsela PRO account (and we only have free account access).