Until more qualified advice comes along here are a couple of suggestions:
For memorising the ayaat you could use some Qur~aanic software which allows you to select an aayah or group of ayaat and listen to them repeatedly. I think the Qur~aan Complex website allows you to do something similar.
I don't know if there are any audios available of the text of Kitaabut-Tawḥīd, but that could be used if found - or alternatively, we have all the audios of the classes so far, alhamdulillaah so you could listen through them.
Ukhti Kareema: If you are able to memorise the texts in Arabic then inshaa Allaah it would have the following benefits:
you would be preserving the Speech of Allaah as it was revealed
you would be preserving the aḥādīth as they were spoken
you would be familiarising yourself with pronouncing Arabic words and memorising them
Then if you were to learn the English meaning as well then inshaa Allaah you will start to pick up the meanings of certain words as well. If you have time you could look up some of the words you don't know and see how they fit into the text and which meaning has been chosen for the translation.
Inshaa Allaah this will be more beneficial than just learning the translation.
And Allaah knows best
I've compiled a list of ayaat we have covered so far for those who wish to use software which allows selection and repetition of aayaat. May Allaah enable us to use this break to catch up where we have been lagging behind and increase us in our understanding and practice of tawḥīd, aameen.
The first number is the the number of the soorah in the Qur~aan and the second number after the colon represents the number of the aayah.