From my experience, most are just some high level instructions on how to use CLI tools installed on the system. A lot of the CLI tools they're calling out to have 0 reputation on Github or don't work at all.
I've had more luck writing my own skills using CLI tools I know and trust.
I've been building a loyalty/membership product for small businesses. My co-founder owns an ice cream shop and complained about how awful the existing products in this space, so we decided to build something better. No apps to download, Apple/Google wallet integration, and really cool analytics for the merchant.
In a senior role, you'll spend more time working with people who aren't developers. PMs, designers, managers, etc. In your first few weeks, book a little bit of time to meet them. They'll appreciate the forwardness, you'll quickly expand your network in the company, and it can be the start of a good working relationship that pays off 3-6 months later.
A search engine for businesses that don't predominantly use Microsoft products and want cross-app search for their SaaS apps without spending tens of thousands of dollars per year like most players in this space offer.
I've had more luck writing my own skills using CLI tools I know and trust.