The Brazilian joined the club in an £8.5m deal from Inter Milan a year ago, and he has been an integral part of Liverpool's rise into genuine top-four competitors.
But the 21-year-old says that he needs to improve his goalscoring rate - he has scored five goals in 30 games so far.
"Sometimes my positioning is not the best and I need to improve that to score more goals," he told LFC TV.
"I want to continue improving and look forward to working harder - and harder on what I need to do to be considered a great player.
"It's a year that has gone very quickly and I am living in a very happy moment.
"I think I have improved with my positioning on the pitch because sometimes I play on the wings and other times in the middle.
"I have improved my knowledge a lot more and have worked harder on my finishing."
Coutinho is confident Liverpool can challenge for a top-four spot this season.
"We are quite confident. Our thought is to win every match and start every match doing our best in this battle, and we have to carry on this way," said Coutinho.
"Our aim is to be within the first four places at the end of the season and we will try our best to keep ourselves up there.
"Here it is really different from other leagues, it is very competitive and sometimes you are leading but if you relax too much another team will overtake you quite quickly and you fall behind again. It is like a battle all the time."