How good is the karo cann?
what is the most drawish opening?

Just stop thinking about 'playing for a draw'. You will lose. Play to win and look for the best moves you can.
A professional can try to play safe for a draw. You cannot.

If you have a completely winning position you could probably force a draw. The best bet is to aim to win. If you aim for a draw you'll draw or lose. If you aim for a win you'll win or draw or lose. Why exclude winning?
Perhaps you're trying to draw a stronger player because you think you have no winning chances? If you try to avoid any risk at the expense of making the best moves your opponent will punish you. Everyone must take risk in a chess game. That's just the way it is.
No opening is very drawish unless both players cooperate. The Caro-Kann is not very drawish. The Exchange Slav can be drawish unless one or both of the players is trying to win.
Edit: As said, if you want to draw you should try to win. The best opening to try to win is probably one you're familiar with.

Your statistics seem to show you drawing 2 percent of your games so it seems like drawing a game even if you wanted to would be kinda tough.
I think Grandmasters are almost the only players who can play for a draw I doubt it is possible for most of us other folks.

The OP has no draws in 19 online games from e4.
19 games is insufficient data to draw any conclusion

When supported by his thousands of other games, the conclusion is obvious: he doesn't draw games, shouldn't attempt to draw games and should focus on improving his play and playing the best moves instead.
19 is enough anyway, find me a GM without a draw in their last 19 games.

When supported by his thousands of other games, the conclusion is obvious: he doesn't draw games, shouldn't attempt to draw games and should focus on improving his play and playing the best moves instead.
19 is enough anyway, find me a GM without a draw in their last 19 games.
and 1.e4 is the most popular opening with GM's
If you are playing for a draw what is the most likely opening that you'll get a draw on? Also, any advices throughout a game to get a draw would be great!