Tutorial for 1.7?

Hi, I am new to elgg. I found the latest recommended release for download is 1.7.8. However, it seems all the tutorials are based on 1.8 and there are quite a few changes.

Could anyone let me know if there is an 1.7 version of tutorial (I do find the Hello tutorial but not the others). Or it is recommended to work on 1.8 now?

Many thanks in advance!