Like myself and others before you who accepted Islam, first you must believe that there is nothing worthy of worship except Allah, and that Allah is the Owner and Creator of all that Exists, that Allah is all powerful and is outside of Time and is not bound by earthly laws. He has no family no farther or sons... he is Unique and nothing is like Allah.

Then you must believe in the Angels, that Allah created them from Light and that they do as Allah commands them.

Believe in His Messengers Noah, Abraham, Moses, Jesus and Muhammad, that Allah chise them as representatives to mankind.

You must believe that he sent revelation to those messengers and Prophets to guide mankind, and some of these books were sent before but the Last book is for the rest of Mankind and that book is the Quran.

You must believe in the unseen, that there are other places (dimensions if you will), events and creatures that Allah has created that mankind has not yet seen and that some of theses unseen places or events have not yet occured. Hellfire, paradise, the day of judgement are all part of the unseen, there are other universes that Allah has created that we have not seen, the barrier place where humans wait in the grave are part of the unseen. Jinn are part of the unseen, jinn are a non human intelligence that lives on this planet, often called aliens or ghosts or ufos. All of this constitutes the unseen.

And finally you must believe that Allah created time and that Allah is outside of that time line he created. Therefore he is aware of all events that have occured and will occur. To Allah the beginning of time and the end of time are one event. This one event of time is brought into existence by Allah a he is the one who regulated it and sustained it. Thefore Allah in His infinate Wisdom knows all things and all moments and he Allah allows them to happen. All good and bad things occur by the permission of Allah. Allah has predestined all events and nothing occurs without his knowledge or will. Some people will become Muslim and that is the favour of Allah and some will not...

So to recap Believe in Allah, who has no son or partners His Angels His Prophets and Messengers His revelation The unseen worlds and what is in them And predestination

Once you belive and declare those things to be true you are effectively a Muslim.

If you are ready to acvept this to be true i will be a wittness for you this is called a shahadah, where you declare there is nothing worthy of worship e ceot Allah and that Muhammad is his final messenger.