What your pastor said is true: Worship will be an important part of our experience of heaven. The Bible tells us that in Heaven "All nations will come and worship before you, for your righteous acts have been revealed" (Revelation 15:4). Perhaps you're right, however; much of what we call "worship" today does fall short of what it should be. We become distracted, and our minds wander and we become bored. But true worship isn't boring - nor will it be in heaven. One reason is because in heaven we'll see God in all of His power and glory and majesty. God is far greater than we realize - and when we enter heaven and see Him as He really is, our immediate response will be to worship and praise Him. In heaven, we'll be singing "Praise and glory and wisdom and thanks and honor and power and strength... to our God for ever and ever. Amen!" (Revelation 7:12).
But the Bible also tells us that God will have work for us to do in heaven. We won't be sitting around on clouds strumming harps all the time - not at all! The Bible says that in heaven, "his servants will serve him" (Revelation 22:3). Unlike here, however, we won't become tired or bored with our work.
Be thankful that some day you will go to be with God in heaven forever, if you have given your life to Christ. In the meantime, ask God to help you learn to worship Him as you should.