You can reduce the difficulty by not trying to join them directly. A technique I've seen many people pull off is the following: 1. Join a team somewhat adjacen

You can reduce the difficulty by not trying to join them directly. A technique I've seen many people pull off is the following: 1. Join a team somewhat adjacent to the team you want to join, preferably supporting them. 2. Identify the most senior people on that team and figure out what their pain points are. 3. Solve these pain points in your free time. 4. After doing this for a few months, ask to join the team. (3) can be difficult, but if you can do it this often works well.