I think we all think about death at some point or another.I'll answer your questions truthfully and bluntly.
I was wondering, does it matter if you do not practice the Christian faith and die? If heaven and hell were to exist, would you go straight to hell for being a non believer?
Yes, it does matter.2 Timothy 2:10Therefore I endure all things for the elect's sakes, that they may also obtain the salvation which is in Christ Jesus with eternal glory.John 14:6Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.There is no other way. No other religion, no other Gods, and certainly no other salvation for us.As far as the fate of nonbelievers, yes you can summarize it as going to Hell if you'd like. It gets a bit more complicated than that but those who are not with God will not see salvation. There are no second chances. You're either with God or against God.One last account from Jesus:Luke 13:23-2823 Then said one unto him, Lord, are there few that be saved? And he said unto them,24 Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able.25 When once the master of the house is risen up, and hath shut to the door, and ye begin to stand without, and to knock at the door, saying, Lord, Lord, open unto us; and he shall answer and say unto you, I know you not whence ye are:26 Then shall ye begin to say, We have eaten and drunk in thy presence, and thou hast taught in our streets.27 But he shall say, I tell you, I know you not whence ye are; depart from me, all ye workers of iniquity.28 There shall be weeping and gnashing of teeth, when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you yourselves thrust out.