Life is full of decisions -- as you are discovering. Some are minor and relatively insignificant but others are major (even if we don't realize it at the time), and they can have enormous consequences. I'm thankful you aren't taking these lightly.
The most important advice I can give you is to seek God's will in the decisions you face. Does God care about them? Of course He does -- and the reason is because He cares about you, and He wants what's best for you. When we make a wrong decision and go the wrong way, God grieves over our foolishness, because He knows we are only hurting ourselves. The Bible warns, "There is a way that seems right to a man, but in the end it leads to death" (Proverbs 14:12).
Don't rely only on your own wisdom, or even on the wisdom of others (although their advice has its place). Instead, ask God to guide you and show you His will. Remember: His way is always best -- always. God's promise is for you: "I will instruct you and teach you in the way you should go" (Psalm 32:8).
How can you know God's will? First, make sure of your commitment to Jesus Christ; if you have never asked Him to come into your life, do so today. Then pray about your decisions, and trust Him to open the right doors for you.