Starting a Genki 1 group is a great idea!
Count me in.
Hello, Miquel-san. ^^
I also learned the Japanese using Genki I.
I found out that, you must learn it together with partner.
All you must do is find a partner. A group doesn't really help, because, I ever made it once.
And not really useful for learn this Genki I.
I suggest you, to find someone for practice. Practice reading and speaking using this book very useful. You'll be able to speak Japanese fast. That will work. I've tried it twice. ^^
If you need any help, please let me know. I also have the work book. Feel free to contact me.