Metro option between NDLS and T1 airport

I am reaching tomorrow but unable to get a clarity on how to reach the airport T1 via metro,

My understanding is, yellow & magenta line via houz khas directly to T1 would be a bad idea as it might be crowded.

Secondly, the high speed airport line goes only to aerocity and T3. I heard there are airport shuttles but don't know where to catch them from.

Can someone please help me finalise a metro route that would help me reach T1 without much hassle? Also, if aerocity route is better, then where can I find the shuttle?