Please help no os but got twrp installed on tf101

I have a tf101 with keyboard dock I accidentally reset everything and removes the factory, os I've gone through the forums on here to find help but I can't seem to get anywhere I've been on this for 3 days and I'm giving up trying to fix this myself I was trying to install the new 5.1 or 4.4.4 katkiss but failed and I was trying to do a duel os I have SdCards and a sub flash drive and my uncle will let me use his windows 10 desktop but idk what all I need to do to successfully complete this project and have it not ruin my tf101

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