edexcel alevel english literature, the importance of being earnest

Hey, I'm surprised you didn't find a lot of resources. This isn't the most popular A Level text but there are loads of resources. Here are just some you could use 🙂
https://www.litcharts.com/lit/the-importance-of-being-earnest
https://www.sparknotes.com/lit/earnest/
https://www.cliffsnotes.com/literature/i/the-importance-of-being-earnest/summary-and-analysis/act-i-part-1
https://www.yorknotes.com/alevel/english-literature/yna-importance-of-being-earnest/study/the-text/01020100_act-i
https://www.youtube.com/watch?v=YI_eixiUFXM (to listen to the full episode you need a subscription unfortunately but it's still worth checking out)
https://www.youtube.com/playlist?list=PLqjEa0SUBJpn8rSxI9HXF3ztOYPQCN5ry
https://lms.su.edu.pk/download?filename=1588441987-the-importance-of-being-earnest.pdf&lesson=15754 (coursehero pdf)
https://www.tes.com/teaching-resource/the-importance-of-being-earnest-11597145
Also, one of the best things you can do when studying a play is watch the production. The absolute BEST production of this play stars Brian Bedford as Lady Bracknell. Unfortunately you have to pay to watch the production online. I watched it on Digital Theatre https://www.digitaltheatre.com/watch/vod/39595718/the-importance-of-being-earnest I have a monthly subscription so it'll expire mid-December. I bought this just to watch earnest and a few other plays. If you want to watch the play you can dm me and I'll give you my account details.
Hope this has been helpful 😄