Don't be discouraged if you do not have an immediate inclination to getting to know God better. No you don't need to get to know God better. Yes it is enough to be saved and to be a part of a Church. The amount of time that you give to developing your relationship with God will always be yours to decide. The depth of that relationship is you decision and never will be anyone else's decision. The concept of "Getting To Know God Better" is for those who hunger for a deeper and more satisfying relationship with God than they currently have.
That being said, another way to address the questions above might be, What is my part in getting to know God better? and "I am saved and go to church, but I don't seem to be growing very fast in my relationship with God. What can I do to nurture my relationship with God?
When communicating with God it makes sense to set aside a certain amount of time, whether it is 30 seconds or 1/2 hour. The setting aside of time will become an integral component in building your relationship with God and obtaining understanding during that time. Just flying off at the handle or releasing a plethora of requests all in the hopes that God hears you and responds to your liking is not the same as communicating with God. Most people prefer the one sided communication because it is easy and requires nothing on your part. But it is hardly a way to grow or resolve anything. If anything people who have this kind of relationship with God generally live with false hope and false fears.
Most false hope comes with a religious only view of God. A religious only view of God is a denominational understanding of God without personal inner-man scrutiny and without depth of understanding based on personal relationship. In other words many Christians believe what they are taught to believe and they learn to have little or no expectations of the miraculous because their experience does not include first-hand knowledge or experience of God's supernatural intervention in their life. If your church or pastor brought you to the Lord and you have accepted the free gift of salvation, that is a wonderful experience and it is perfect in every way. Getting to know God better is about taking that experience and seeking God for more information to receive more understanding so that you can better operate under the economy of God. This reaching out or reaching up to God comes with a promise and that s why you can rest assured that there is more and that you want it.
Jas_1:17 Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
Psa_53:2 God looked down from heaven upon the children of men, to see if there were any that did understand, that did seek God.
Heb_11:6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.