Five minutes from now, you officially become God of the entire universe, anything and everything, all that exists and ever will exist and ever has existed. You have supreme power, and access to supreme knowledge -- but you're still you, at least at first. You don't instantly become omniscient -- you have to consciously access that knowledge. Same for any other power.
Upon becoming God, you also have the ability to instantly relinquish your Godhood permanently, returning to your normal state, the world continuing on precisely as it did before you became God. But once you give up the power, it's gone forever. In addition, if you do take this path, you cannot ever forget that you were God. You will always know that you had the opportunity.
As God, you will now be able to know the truth of reality -- all of reality, whatever it is. If you choose to do so, you can access any information you want. If it so happens that one particular religion ended up being true (it doesn't matter what religion or philosophy), you automatically supersede whatever deity or deities that religion describes, thus enabling you to alter or erase the current structure entirely, or maybe choose to make a different established religion the "correct one". Of course, you can also fashion a new existential regime all of your own. It's all up to you. You are God, after all.
So, do you immediately free yourself of this greatest of burdens and go back to normal life, even with the knowledge that you could have changed something? Would you just change a few things, make your life better in some way, or the lives of friends and loved ones? What about all of other people suffering on the world? If you choose to access all the information in the universe, could you ever "go back" to your old self? Would the monumental knowledge change you too much? What are the ethical ramifications of having the ability to bring peace to the world, to all of existence, but choosing not to do so and instead rejecting your new power? What would true peace even be like? Do you think you can even answer this question honestly? It may be easy to say that you'd reject such a gargantuan responsibility now, but would you really do that if you had the power? Could you resist even tweaking just a few things you don't like?