No problem! There's a lot to be looked at because this touches on other doctrines. As you've already asked about Heaven and Hell. I believe that Hades is the grave, Gehenna is the Lake of Fire that John writes of in Revelation and it is a physical location outside of Jerusalem. Tartarus is a place reserved for demons. I believe in Heaven, but I don't believe that people go there. The promised inheritance is the land. not Heaven. The idea of going into the Heavens is actually a Greek belief, not a Biblical one. At the time of the NT the popular belief among the Greeks about the dead was that after they died they left the body and ascended into the heavens. As more and more Gentiles became Christians they brought their old beliefs with them and as time went on and things got farther from the apostles this idea began to creep into the faith.
Before I said that man returns to the dust and the breath of God returns to Him. I said that man of the dust of the earth. God actually called Adam dust.
In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return. (Gen. 3:19 KJV)
In Ezekiel God gives a picture of the Resurrection. It's interesting how He explains it. All of the red words are the word ruach, it's all the same word. After giving the vision to Ezekiel He explains what it means. Notice in verse 14, after putting the bodies back together God says that He will put "His" Spirit in them and they will live. Notice He didn't say He would put their spirit back into them, but rather it is His Spirit that is in them and they live. That's the same thing we see in Gen 2:7
Ezekiel 37 and Ruach
1The hand of the LORD was upon me, and carried me out in the spirit of the LORD, and set me down in the midst of the valley which was full of bones,
2 And caused me to pass by them round about: and, behold, there were very many in the open valley; and, lo, they were very dry.
3 And he said unto me, Son of man, can these bones live? And I answered, O Lord GOD, thou knowest.
4 Again he said unto me, Prophesy upon these bones, and say unto them, O ye dry bones, hear the word of the LORD.
5 Thus saith the Lord GOD unto these bones; Behold, I will cause breath to enter into you, and ye shall live:
6 And I will lay sinews upon you, and will bring up flesh upon you, and cover you with skin, and put breath in you, and ye shall live; and ye shall know that I am the LORD.
7 So I prophesied as I was commanded: and as I prophesied, there was a noise, and behold a shaking, and the bones came together, bone to his bone.
8 And when I beheld, lo, the sinews and the flesh came up upon them, and the skin covered them above: but there was no breath in them.
9 Then said he unto me, Prophesy unto the wind, prophesy, son of man, and say to the wind, Thus saith the Lord GOD; Come from the four winds, O breath, and breathe upon these slain, that they may live.
10 So I prophesied as he commanded me, and the breath came into them, and they lived, and stood up upon their feet, an exceeding great army.
11 Then he said unto me, Son of man, these bones are the whole house of Israel: behold, they say, Our bones are dried, and our hope is lost: we are cut off for our parts.
12 Therefore prophesy and say unto them, Thus saith the Lord GOD; Behold, O my people, I will open your graves, and cause you to come up out of your graves, and bring you into the land of Israel.
13 And ye shall know that I am the LORD, when I have opened your graves, O my people, and brought you up out of your graves,
14 And shall put my spirit in you, and ye shall live, and I shall place you in your own land: then shall ye know that I the LORD have spoken it, and performed it, saith the LORD. (Eze 37:1-14 KJV)
Red = Ruwach
Breath, wind, spirit.