We're not even an established top club yet. We've finished in the top three just twice.
It took Barca 40+years to win their first European Cup and another 14 years to win it again.
Europe can wait. It was pointed out earlier this week that the difference for Chelsea from getting knocked out in the quarters last season to winning it this season to was £26-£33m. So we don't need to worry too much about Europe for a while; just being in it, and hopefully next season getting through to the knock out stage is more than enough for a few years yet.
We need to retain the Premier League title. That is a must and our most important job!