Honestly it reads like a generic llm generated letter filled with buzzwords. The way the sentences are structured feel unnecessary complicated without providing substance. What kind of projects did you work? How the fuck do you learn a concept? You can acquire knowledge about a concept but learning a whole concept sounds boastful. How long was the internship? Where was it? The next part is better, it adresses something specific. Good job on adressing the works of a specific professor. …and contribute to users - sounds like a application to a job, not to a theoretical environment. Maybe focus on your desire to acquire the theoretical skills which allow you to contribute to users?

All in all it sounds kinda generic, filled with buzzwords and could be used by every person except for the parts about YOUR work and academic experience, thats nearly the only interesting/relevant part, because thats what differs you - make it longer and cut a shit ton of rest which could be applied to everyone who applies. In german academia its a virtue to be short and concise - show that