I know the "we don't have playoff experience" argument feels like an excuse... Except it's true, especially against a veteran team in Washington.
Reinhart is 26, yet he has just played his first professional playoff game ever AND his first playoff game since 2014/15 WHL playoffs (he played at some WCs at least, but that's a somewhat different animal). Lundell also just played his first NHL playoff game; same for Luostarinen.
Let's look at our key players. Barkov and Huberdeau - both with 17 career NHL playoff games, including the "play-ins". Ekblad - 11 career NHL playoff games (again, including the "play-ins"). Weegar, also with 11 games. If we stick to the D: Forsling, 19 NHL playoff games. Gudas, 27 NHL playoff games. Montour, 28 career NHL playoff games. Chiarot is by far our most experienced D with 57 games and the only guy on defence who played over 30 games in the playoffs.
Verhaeghe has been in 17 NHL playoff games; Duclair has just played his 7th NHL playoff game; same for Marchment and Lomberg. Bennett with 36 NHL playoff games is our second most experienced top 9 forward playoff-wise, Giroux takes the lead with 86 games. Of course Hornqvist (97) and Thornton (186) have a lot of experience, but both are just depth guys at this point; Thornton didn't even dress in Game 1.
Shockingly, Giroux and Bennett were the two forwards to get on the scoresheet.
To put this in perspective, Washington's biggest star is Ovechkin has played 142 NHL playoff games. Kuznetsov has 82 playoff games under his belt; Wilson has 83 games, Backstrom has 134, Oshie has 97, Eller has 91, I could go on. Their n.1 D Carlson has 118 NHL playoff games under his belt. After the first game, our entire forward group without Horqvist has combined for 197 NHL playoff games; if you substract Giroux as well, you get to 111. Carlson alone has more played playoff games than our entire D group sans Chiarot; with Chiarot, it's 118 playoff games (Carlson) vs. 153 playoff games (our entire defence).
In Game 1, Washington dressed three skaters who don't have at least 20 NHL games under their belt: Larsson (1st NHL game; 4LW); Fehervary (3rd NHL game, 2018 2nd rounder, top pairing D) and Mantha (6th NHL game; 3LW). We dressed 12 guys with < 20 NHL playoff games: our entire first line, our 2LW, our entire 3rd line, our 4LW and 4C; our 1D, 2D and 3D.
We do have the experience in net if it's Bob (42) vs. Vaněček (2), but we also have a rookie head coach in Brunette (1 playoff game) vs. a Cup winner and two-times runner-up in Laviolette (149 games).
I still believe we will beat Washington, but it definitely won't be easy.