Seeking advice turning views into subscribers

I'm fairly new to posting on Substack, with just a handful of posts so far.

I have a decent-sized social media following, so I'm getting hundreds of views and lots of positive feedback and discussion on social media around my posts. However, I'm struggling to turn these views into actual email signups.

I include multiple nudges to sign up in each Substack post (and a simple encouragement to subscribe in social media posts), but out of a few hundred views, I only get one or two new subscribers per post.

1) Is this normal?

2) Short of begging my social media followers to just freaking subscribe already to help boost my reach, what else can I do to encourage them to sign up?

Thanks! And happy writing!