Welcome to the forum. Hopefully you will find many answers here. You will find taht a lot of us are reverts ourselves and have gone through much of what you are facing. For starters read the posts in the Discover Islam section.

You will know when you are ready to say the shahadah and at that time do not let anything stop you. Also remember, your shahadah is valid no matter where you are and you can even be alone and say it only to Allah(swt) many of us did that and that was when we knew we were Muslim. Later you may want to say it again at the Masjid, but that is only because you want to publicaly announce you are Muslim. Where you say it, is not what makes you a Muslim. Why you say it is what does.