How to decently start with Skavens ?

Hey folks. I seek advices.

A bit of background : I discovered Total War Warhammer 3 months ago, and as a great STR lover I immediatly fell in love with the game. I started playing High Elves. Then I switched dark elves, I mostly disliked them. Then lizardmen, Empire, dwarves etc.

There is one faction I wasn't interested in, until few days ago : Skavens. Every time I fight them I usually destroy them. I gave them a try, which ended being wiped turn 15. As I previously noticed, my troops were weaks, and I don't really like it. I like strong frontline holding the fight while being mobile on sides, and it looks like Skavens don't rely on this. Instead, relying in numbers only makes unconfident about my front lane.

Can you guys give me some tips in order to enjoy playing with Skavens ? The "easier" clan, how to build my armies, what to focus on...

Thanks in advance.