The Finn has made the step into an F1 race seat at the wheel of a car that has fallen way below Williams' high expectations, primarily due to poor aerodynamics.
Bottas feels his performances have been masked by the issues, having out-qualified and out-raced team-mate Pastor Maldonado in three of five races so far in 2013.
"Personally, I'm more or less happy with what I've done. When you look back there are always things you could have done better," he said.
"But it's not been a bad start. Some of the good things I am doing in the car are difficult to see from the outside.
"I've got positive feedback from the team, and pace wise I'm matching Pastor. We've been very close this season.
"So for a rookie year it's been good, but I know there is more to come and I'm learning more and more."
Should both of the Williams cars finish outside the top 10 in Sunday's Monaco Grand Prix, the team will have gone six races without a point at the start of a season for the first time in their long history.
Considering a little over a year ago Williams were celebrating victory in the Spanish Grand Prix, their slump has been unexpected and dramatic.
"No one expected we wouldn't have any points up until now because we were hoping to make a step forward from last year," Bottas continued.
"It is what it is now, and hopefully this year we have a chance of finishing in the top 10 in some races if everything goes smoothly.
"We just need to work hard, try our best, and let's see if we can end up in the top 10, which should be the goal this weekend."
Of all this year's rookie drivers, Bottas was the only one who had not driven around Monaco's streets prior to yesterday's two practice sessions.
Although describing it as "brilliant to drive", Bottas appreciates how difficult the coming two days will be.
"It's going to be my most challenging weekend of the year," he said.
"It is the most difficult circuit of the season, so to get the most perfect lap in qualifying is going to be tricky.
"But I feel well prepared, as much as I can be. I don't have any apprehension as I've had no problems so far at other new circuits."
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