"If I come to the Lord because I do not want to suffer hell or isn't that just selfishness on my part and wouldn't that be sin?"
When in a burning house, you don't care about how you feel about the rescue workers that are in there to get you out, you just want out.
One of the most important principles for us to digest when this type of question arises is the fact that God overlooks so many things because faith is being expressed.
The reward of that rescue worker in that burning house is to hear you cry out, "I AM OVER HERE", OR hearing a whimper a cry, and sometimes nothing, but your dragged out without your consent, Jude 1:23 And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh.
Faith is the vital factor in this. You came to God because the Spirit was drawing you. You repented because you heeded the Holy Spirit's wooing message. Even if that message was about a house burning down and you need to get out. It doesn't matter, the most important thing here is that you reached out by faith and grabbed unto God, THAT Sister is THEE most important thing.
There is NOW no condemnation to them that are in Christ Jesus. God hasn't given you a spirit of fear, but of love and power and a sound mind. If your being condemned by HOW you came to the Lord, this condemnation is either coming from your heart or an outside influence. What matters now is that your a child of God and your in Him by Faith.
If you had of remained in the house that was being consumed, and you thought about your motives about being rescued, if you had of hesitated, you would've been dead. Thank God by the mercy and His grace that He rescued you from a horrible pit.
Remember Lot? He hesitated. Lot believed God but He didn't want to leave the comforts of his home, neither would I. To him it was like he was dreaming, but regardless of what Lot wanted, God thru the Angels grabbed him and his family and ushered him out of the city. Your rescuer went to the cross and was offered up as a "burnt offering" so that you wouldn't have to be burnt.
Who can fathom the love of God and His ways are past finding out.