Correct progression in Butterfly.... and aysha?

Okay so exams are over, and i'm back on the pole after about a 6 week break. My strength is definitely not what it was, bt i'm looking forward to working on it! Before I stopped, I got the basic butterfly, and split grip basic butterfly, but it's not very strong. I'm just wondering how I should try progress because I can't seem to do elbow grip at all.. can't even hold myself in caterpillar with elbow grip! The split grip butterfly isn't strong and I can't even contemplate trying extended! I'd also like to be able to do the aysha (forearm grip and eventually elbow grip.... then split grip sometime) as it feels sort of like butterfly. I managed to sort of get this today, I'll upload a vid later. So, can anyone suggest how might be the easier/safest/best way to progress through these moves. Is there anything i'm missing, or any tips that can help my get elbow grip? Thanks guys!