tbh mate it doesn’t sound like a great place to work.
you should have some sort of professional development plan that supports you to gain the skills you need.

From their point of view that saves them having to hire a more experienced and therefore more expensive Google Ads specialists further down the line. Recruitment is expensive and a bit risky for them, and there is an onboarding period.

So, the fact that they aren’t very responsive to someone who has come to them and says they wants to develop skills that they need means they are not a good place to stay for your own career development.
Sometimes you need to move about a bit to find the right fit, and it doesn’t sound like the place you at right now is going to provide what you need.