Planning to go to the Champions League final on 6/1.

How easy is it to get to Wembley from London? I’m going to be there 3 days and 1 of them is the day of the game. Assuming there is more stuff to see/do near London, would it be better to stay in London and travel to Wembley the day of the game or should I stay in Wembley and travel to London the other days. Trying to find the right balance between cost and convenience as I want to minimize travel timr. Thanks!!