How do you get this abundant life? Confess with your mouth that Jesus is Lord, and believe in your heart God raised Him from the dead, and you will be saved (Romans 10:9).
Then, you can Trust in the Lord with all of your heart, and lean not on your own understanding, and acknowlege Him in all your ways, and He will direct your path (Proverbs 3:5-6).
While life as a Christian is not a promise of things always going right, trust in the Lord is what gives you a firm foundation, a solid base upon which to live your life.
If you want to seek after God's heart for you, seek out the scriptures daily, journal, pray, and seek insight from those you respect as elders in the Lord. Thank the Lord for His blessings in your life, and seek to be a good steward of all that He has entrusted to you. But, never forget that it is in Him we live and move and have our being (Acts 17:28)...we cannot do this life in our own strength. He is the rock (Psalm 62:2) upon which we live. Seek Him (Matt. 6:33), and you will find the answers for your life.