This topic is very broad, @InnocentLuck. But, most service-based companies don't do any hardcore frontend development like a product company. They just stay in the practical layer rather than the innovative layer. They just use the tools available in the market to build some moderately-complex web application that is data-intensive which drives the business needs of the client/customer of that application. Then provide support to it and maintain them as per customer requirements in return for money.
As you have mentioned about Angular, from a frontend-framework perspective, learn about binding, components, routes, modules, services, pipes, directives, npm packages. Understand their purposes, why they are used in Angular. These are concepts that make angular "framework" rather than a library. Some concepts are common to other frameworks. What I have seen in my juniors is that, those who have the basic understanding of these concepts are able to navigate on their own, and those who don't have any clue are clueless about what kind of effort to take from their side and become stuck. Understand TypeScript. It is stricter than Javascript, which will be helpful to point out the problems as you are a beginner.
At the end of the day, as a developer in the team, you would be expected to get a requirement from your project client, it will be in a written format, in English. It might not be very technical like you might expect, but more like a functional requirement. It is your duty to "translate" the requirement to developer-level details/task. Usually there might be managers and leads to do this translation between you and the client, you just have to get the understanding from them and do the needful development and testing and finally, the deployment and support.
As a beginner, you are not expected to have knowledge similar to an experienced person with the same skill set. But what is common between a beginner and an experienced person and what makes a beginner more experienced is the want and need to know more. Be thirsty to try new challenges and be hungry to find the solutions. I would like to appreciate your spark of sincerity towards your work and realisation of your own knowledge. Not many in this field have that. Do not lose that spark. Let it be fire. Let it burn your efforts and give you skills. All the best wishes.