Your subscription list is hidden when you're currently viewing a community or a user's profile. It should be at the bottom of your sidebar on the right if you're on https://lemmy.world/ or whatever instance your account belongs to when using the default desktop view.
You can also use something like https://old.lemmy.world/ and your subscriptions will be in the dropdown in the upper left under "my communities". This can be viewed even when viewing another community/user's profile.
A little more complicated than that, if you want to go to a community hosted on your instance (in your case lemmy.ml), you would go to https://lemmy.ml/c/asklemmy. This is different from the Ask lemmy hosted at lemmy.world.
To navigate to this community hosted on lemmy.world from your instance, you would instead use https://lemmy.ml/c/[email protected] <your_instance>/c/@<instance_hosting_community>
Using an "!" [email protected] lets you create a clickable link for other people to a specific community.
I'm not sure if just deleting/GDPR an account is enough to get all of their comments removed.
A lot of the comments I've seen promoting AI sound very similar to ones made around the time GME was relevant or cryptocurrency. Often, the conversations sounded very artificial and the person just ends up repeating buzzwords/echo chamber instead of actually demonstrating that they have an understanding of what the technology is or its limitations.
Bots advertising crypto scam. If you look at the first comments they're essentially all the same nonsense and just adding in random buzz words associated with crypto/ai.