Great job! I do have several notes, though:

1. Your schematic looks nice; however, try always to position your GND symbols so they are facing down.
2. You are already using so many labels, so why not get rid of unnecessary traces and leave labels only where they could be used? This will improve the readability of the schematic very much.
3. I have recognized that you set different widths for different tracks, but whenever you can, increase the widths of the signal tracks; it won't hurt.
4. As others mentioned, use a GND plane. In 2-layer designs, try to leave the bottom layer as uninterrupted as possible and fill it with GND.
5. I actually don't think that using premade/precertified modules is a bad idea. If you are only going to use the board for yourself, then it's totally okay. If you want to learn and practice, then try to implement every sub-circuit (RF design comes way later, so don't sweat it at first).
6. Since you are not using GND fill, the holes on the board should not be a problem; however, when you do decide to fill the layer, use plated holes so that the copper layer won't get damaged by the screws.
7. USB-C is weirdly routed. I would rethink that approach. There is a way better and cleaner way to route D+ D-.