I suggest you to read the book "Towards understanding Islam". http://www.witness-pioneer.org/vil/Books/M_tui/chapter1.html
www.islambasics.com/index.php?act=download&BID=56
First you should know what are Islamic beliefs.
Allah
(59:22) He is Allah: there is no god but He; the Knower of the unseen and the manifest, He is the Most Merciful, the Most Compassionate.
(59:23) He is Allah: there is no god but He: the King, the Holy, the All-Peace, the Giver of security, the Overseer, the Most Mighty, the Overpowering, the All-Great. Exalted be He from whatever they associate with Him.
(59:24) He is Allah, the Planner, Executer and Fashioner of creation. His are the names most beautiful. Whatever is in the heavens and the earth extols His Glory. He is the Most Mighty, the Most Wise.
His Angels
Read Quran 2:97-98, 22:75, 50:17-18, 72:10-12, 2:30-29 etc.
His Books
(2:87) And We gave Moses the Book and sent after him a train of Messengers in succession. Then We sent Jesus, son of Mary, with clear Signs and supported him with the Holy Spirit. Then how is it that whenever a Messenger came to you wish that which did not suit your lusts, you grew rebellious against him, and repudiated some and slew others.
(2:88) They say, "Our hearts are secure." Nay, the fact is that Allah has cursed them for their disbelief; so they are little disposed to believe.
(2:89) And how are they behaving now towards a Book which has come to them from Allah? Inspite of the fact that it confirms the Scriptures which they already possessed. and, inspite of the fact that, before it came, they used to pray for a signal victory over the disbelievers, they rejected it when it came, although they recognized it. May Allah's curse be upon such disbelievers!
His Messengers
(2:135) The Jews say, "Become Jews and you will be rightly guided" ;the Christians say, "Become Christians and you will have the true guidance." Say to them, "Nay, we turn away from every other way and accept the way of Abraham, and Abraham did not associate other gods with Allah."
(2:136) O Muslims, say to them, "We believe in Allah and the Guidance which has been sent down to us and which was sent to Abraham, Ismail , Isaac and Jacob and his descendants and which was given by their Lord to Moses and Jesus and to all other Prophets. We do not discriminate against any of them and we have completely surrendered to Allah as Muslims."
Doomsday
(22:5) O mankind! If you have any doubt concerning Resurrection, then know that it is surely We Who created you from dust, then.....
(22:6) All this is because Allah, He is the Truth, and because He resurrects the dead, and because He has power over everything,
(22:7) (all of which shows that) the Hour shall surely come to pass - in this there is no doubt - and Allah shall surely resurrect those that are in graves.
Estimate of good and evil is from Allah
(35:2) Whatever Mercy Allah accords to people, none can withhold; and whatever He withholds, no other will be able to release after Him. He is Most Mighty, Most Wise.
Resurrection after death
(36:77) Does man not see that We created him of a sperm drop, and lo! he is flagrantly contentious?
(36:78) He strikes for Us a similitude and forgot his own creation. He says: “Who will quicken the bones when they have decayed?”
(36:79) Say: “He Who first brought them into being will quicken them; He knows well about every kind of creation;
(36:80) He Who created from a green tree a fire for you, a fire to light your stoves with.”
(36:81) Has He Who created the heavens and the earth no power to create the likes of them? Yes, indeed, He is the Superb Creator.
(36:82) Whenever He wills a thing, He just commands it “Be” and it is.
(36:83) Holy is He Who has full control over everything, and to Him you shall all be recalled.
read 50:14-15
Jinn
(51:56) I created the jinn and humans for nothing else but that they may serve Me;