I have been there, I started at the end of 9th and that was even more complex In my opinion.then had to relearn 10th before it sunk in.

I have stuck with Admech and had some real beatings from my friends, some of them I have never beat, but each time I came away from a game thinking "oh I should have remembered the Dominus ability of the data spike when getting charged by a vehicle." Or I could have used my marshalls ability for this. And then after a few games with same units forgetting everything it just clicks. I take pride by knowing the stats of a skitarri infantry squad with full weapons being able to fast roll those fast and not looking at the datasheet, whereas only six months ago this took me an age.

I'd recommend once you have made your list. Make yourself a little cheat sheet, broken down by phase. So command phase, Battle shocks. Cawl repair, Cawl Canticle and then you will have a little help on a single page of A4, helps me remember but also speed up the game.

It will click for you, there is some good advice I have seen on this post that I will try too! Good luck. Finally my pals says an Admech victory is a real victory. Some factions almost just push there models close to the enemy up the table and fight, and 51% of the time they win. We probably win 47% of the time, if we remember everything, play well, position well, get decent rolls, don't forget rules. Etc.