We started a 30 Days Of React challenge on 1 October and it has been going well so far. Thousands of students are participating in the challenge. Almost all the participants are very happy with the content of the challenge, exercises, and projects. You can start the challenge at any time and finish it whenever you want. There are more than 400 people in the telegram and the members are very supportive. In case, you are looking for React material to solidify your React skill you may try out the 30 Days Of React challenge.
You may have a look one of the 30 Days Of React challenge mini-project: https://www.30daysofreact.com/
Previous challenges by the same author: