I want to choose to go second

I never, ever want to go first with my Mewtwo deck. I only use mewtwo because they're my favorite mons in the game (not because I have 3 gold mews and a gold mewtwo) and have tweaked this deck to how I like to play.

I literally never ever wanna go first. I either lead with mew or mewtwo, and the 3/4 energy cost warrants getting an energy on asap. There's no way for physic to get first turn energy, so I want to go second.

I dont have a spreadsheet or anything, but i have a nearly 100% win rate when I go second. When I go first I feel like I don't win at all. Besides losing to articuno or celebi, I don't lose when I go second. Even then, it's a toss up due to mew copying celebs.

It's made the "5 win streak" challenges insanely frustrating. It's just not fun that I cant choose whether to go first or second.