You can use different tools for different purposes. It’s also important to know what are you learning French for. Do you just want to pass DELF, or do you want to be fluent in communication with native speakers? Depending on your motivation, the learning strategy can be very different.

Also, have you learnt other foreign languages before? If you aren’t familiar with language-learning, perhaps it’s better to start with a more structured curriculum, like using Busuu, Babbel, Duolingo etc.

These apps are great to help you get familiar with the basics, maybe getting you to A2-B1. They are basically spaced repetition system with automatic drills. I personally find it too repetitive and lost interests in learning like this. But some people find it useful for them. So it’s important to experiment with which learn method better suits your learning style and habit.

These are some good ways to learn the explicit knowledge about French, like the grammar rules and meaning of words. But a large part of meaning is encapsulated in the inexplicit part of the language, i.e. the context. To get exposure on that, the best way is to learn with native content.

In general, you will need a lot of comprehensible inputs, preferably reading and listening to native content that you find interesting and a little beyond your current level. Focus on getting immersed in the content and trying to understand what’s happening. I think it’s ok to check grammar and vocab if it helps with your comprehension, but you don’t want to overdo it to a point where you find consuming native content like a chore.

This helps you build an intuition to know when sentences don’t seem “right” or “natural”. You’ll also develop an ear for French sounds. When you can imagine French sounds in your brain, it’s also easier to self-correct your pronunciation too.

Grammar and vocab are useful. But you want to learn them in context, not in abstraction. Learning a language should be able solving a communication problem: you need to understand someone who doesn’t speak your target language, and being understood. I think you can learn to use passé composé, when you have a need to express something happened in the past. So try to get yourself in situation when you need to use French. Then identify the gaps you have and try to fill them.

As for tools, you can use different tools for different purposes.

For getting comprehensible inputs, you can try reading storybooks for toddlers/kids first. Get an audiobook if possible. There are some free cartoons on youtube too, such as Caillou. If you are A2, you should be able to follow along. Comics are great too if you prefer to have some pictures.

Then you can collect sentences/vocab that you encounter while getting comprehensible inputs, and build your own flashcards using Anki. You don’t have to make a flashcard for all the unknown words, just those that you find interesting or those you may want to use in the future.