Not really, certainly not at 100 subs. I've earned... one tenth of a cent so far, over two months, and I have nearly 200 subs.
Ad revenue is only worth anything if you have tens of thousands of active subscribers. Opening it up is more like an achievement medal than anything.
If you want to make a living making comics, ad revenue is a tiny drop in the bucket. Your best bet for stable income is offering things on Patreon, and taking commissions on the side. I hold down a stable teaching job on the side two days a week, which pays for my essentials, so part-time work separate to comics is also a good option!