Don't depend on your own understanding. Ask God. God has information you don't know, and he's a lot smarter than you. Even with right information, we can make wrong decisions. Satan blinds us at times. Strong emotions and strong desires can cloud our thinking. There are many reasons we make bad decisions.
Jeremiah 17:9 10 says, the heart is deceitful above all things and beyond cure. Who can understand it? God answers, I, the lord, search the heart and examine the mind.
Jeremiah 10:23 I know, O Lord, that a man's way is not his own. No one who walks directs his own Steps
God wants to guide you. Jeremiah 29:11 For I know the plans I have for you, declares the Lord. Plans to prosper you and not to harm you. Plans to give you hope and a future. God's plans are specific and personal to you. It's not just general principles but individual assignments.
Ephesians 2:10 says, we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do. God's plan is for you to walk with him, guided step by step.