Honestly how far am I going to get learning German with just doing like an hour of Anki and an hour of immersion every day? This seems to be the new suggested way to learn languages instead of doing book study the whole time.

I've learnt around 1500 words and can pick up the gist of most the the sentences in videos that I watch. It's honestly pretty fun and entertaining. Will I eventually pick up how to do do the four cases and shit or should I just bite the bullet and sit down with a grammar book?

I'm 27 years old. How do I stop getting in my head about my age? I keep feeling like it's too late to succeed in what I'm doing. I just want to be a good software engineer.

I know that blaming my age is an just a lame excuse not to work hard and contains a silent comparison to my peers.
I know you always lose the comparison game. I know that only a single of my peers has successfully started a startup in his 20's out of all of my friends.
I know I'm comparing myself to outliers.
I know that using your age as an excuse is just wallowing instead of confronting my mediocrities.
I know it's rooted in an anxiety of trying to predict the future and I know it's an obsession over possible outcome instead of process. I know that I either have to lower my expectations or change what I'm doing drastically.
I know it's not going to happen as quickly as I want it to.
I know that I have the power to change this, I just seem to be stuck in inaction and hopelessness.

Why can I know all this and still not just move on? I guess nobody can take the first step for me, right? What's the smallest step I can take to a positive direction?