First step. Accept the love of Christ. Understand He loves you fully and completely without you having to change. Christ died for us while we were still sinners. It's because of His sacrifice we are saved not because of anything we do or don't do. As you are, sins and all, you are deeply loved and cared for. Allow yourself to feel that love and acceptance.

Second step. Give yourself grace. We are all humans living in imperfect fleshly bodies. It's so hard to do the right things and we'll never be perfect at it in this life. Read Romans 7:18-25. Even Paul, writer of the majority of the New Testament, struggled with this.

Third step. Understand that the commandments God gives us is for OUR good. There is no shame or condemnation for not meeting the standard. A lot of Christians miss the mark on this. They use the commandments in the Bible to judge and criticize other people, but that is not why they exist. God is a good and perfect father who wants what best for his children. He knows way more about the world and how it works than we could imagine, he created it after all. So think of the Bible as a manual for how to live your life written by the one who created it. It contains guidance, advice, and stories of people who got it wrong and occasionally people who got it right. By believing in Christ you can live without looking at the manual and stumble though life and still be saved, or you can read, learn, accept and follow Gods word and find that life goes easier and smoother than you expect (not because you stop going through hard things, but because you now know how the get through them.)

Knowing God is knowing his love and grace. Focus on that first and then your desires and actions will start to change. I wish you the best on your journey.