The Costa Rican striker was unlucky not to score at the weekend as his shot was tipped on to the post by Ben Foster, and team-mate Mark Schwarzer has backed him to come good
Ruiz signed from FC Twente on deadline day but has failed to open his scoring account for the Cottagers and missed a penalty in their League Cup shootout defeat to Chelsea.
The Costa Rican was denied by a fingertip save from West Brom goalkeeper Ben Foster on Saturday in his side's goalless draw in the Midlands.
Asked if he felt pressure to justify his reported £10 million fee, Ruiz told reporters: “No. Not really.
“I'm just going to do my best and show my quality. I hope people will see me at my best very soon. I need to play. For sure I need to play.
“I feel good. I'm fit. I know I can play 90 minutes in the Premier League. I played for 120 minutes against Chelsea and that has helped me. If I play more matches, I will get more confidence from that.
“[The manager] has said to me that he knows it will take some time for me to adapt. But I'm here to play.
“Everyone who knows me, knows that I want to play. I'm working hard in training to get my rhythm and hopefully I'll play some more in the next match.”
Ruiz said he was enjoying the anonymity which came from living in a city where few recognised him, but said there had been a big reaction in his homeland over his move.
He added: “Everyone is really happy for me that I'm playing in England.”
Team-mate Mark Schwarzer also backed Ruiz to come good after his low-key start.
He believed Fulham were worthy of at least a point against West Brom and highlighted the striker’s miss as one example of how close they were to snatching all three.
“I thought we were unlucky and the goal in the first half by all accounts was not offside. And Bryan had a good chance,” he told reporters.
“It is a massive change for him, it’s a massive change. It’s a big step up from the Dutch league, the pace of the game is totally different. But he is a quality player and he will definitely come good.”
Schwarzer managed to last the entire 90 minutes despite injuring himself midway through the second half as he went out to punch a cross.
“It was a back spasm but hopefully that’ll be it. I’ve had some treatment," he said.
“I landed on my arm with it behind my back, so a bit painful but hopefully it won’t be anything major.”